Scientists at IOCB Prague are uncovering new details of gene transcription. They have identified a previously unknown molecular mechanism by which the transcription of genetic information from deoxyribonucleic acid (DNA) into ribonucleic acid (RNA) can be initiated. The researchers focused on a specific class of molecules known as alarmones, which are found in cells across a wide range of organisms and whose levels often increase under conditions of cellular stress. The results were published in the prestigious scientific journal Nature Chemical Biology.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/UOCHB_Vyzkum_z_UOCHB_odhaluje_dosud_nepoznany_zpusob_prepisu_geneticke_informace_bc2bfffa6c.jpg" alt="IOCB Prague/Tomáš Belloň: Research from IOCB Prague reveals a previously unknown mechanism of genetic transcription: Dr. Hana Cahová, head of the Chemical Biology of Nucleic Acids research group." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_UOCHB_Vyzkum_z_UOCHB_odhaluje_dosud_nepoznany_zpusob_prepisu_geneticke_informace_bc2bfffa6c.jpg 234w," sizes="100vw" width="2000" height="1335"><div>Molecules of ribonucleic acid can carry a variety of chemical modifications at one end, known as caps. In eukaryotic organisms, including human cells, the best-known cap plays an important role in RNA stability and in regulating its subsequent fate. In recent years, however, it has become clear that alternative, non-canonical RNA caps also exist, although their formation and the mechanisms by which they are attached to RNA remain only partially understood. These include alarmone caps, formed by dinucleoside polyphosphate molecules, that protect cellular RNA at moments when the cell is under threat.In their study, <a target="_blank" rel="noopener noreferrer" href="https://cahova.group.uochb.cz/en">Dr. Hana Cahová</a> and colleagues examined bacterial RNA polymerase and investigated how this enzyme can initiate transcription using dinucleoside polyphosphates (NpNs) instead of the standard RNA building blocks. For the first time, the scientists described, at the atomic level, how RNA bearing an alarmone cap can be generated directly at the initiation of gene transcription. They also observed that NpNs bind through a different type of base pairing than is typically observed.The work was significantly shaped by Valentina Serianni from Hana Cahová’s team, who demonstrated the ability of dinucleoside polyphosphates to initiate gene transcription, and by Jana Škerlová, who focused on the structural analysis of RNA polymerase. Using cryogenic electron microscopy data, she showed how dinucleoside polyphosphate molecules bind within the active site of RNA polymerase – that is, the core of the enzyme where genetic information is transcribed. Together, their findings help to elucidate the processes that accompany the transcription of genetic information from DNA to RNA.Hana Cahová adds: “We’re describing something that truly occurs in cells and that we’re now able to observe directly at the level of individual molecules. This allows us to answer fundamental questions about cellular processes, such as how cells adapt to stress. RNA plays a central role in this, as it carries the cascade of information underlying any cellular response – for example, to threatening conditions caused by nutrient deprivation or temperature shock.”<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/UOCHB_Vyzkum_z_UOCHB_odhaluje_dosud_nepoznany_zpusob_prepisu_geneticke_informace_2_0fe88ff9e9.jpg" alt="IOCB Prague/Tomáš Belloň: Research from IOCB Prague reveals a previously unknown mechanism of genetic transcription: Dr. Tomáš Kouba, head of the Cryogenic Electron Microscopy core facility." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_UOCHB_Vyzkum_z_UOCHB_odhaluje_dosud_nepoznany_zpusob_prepisu_geneticke_informace_2_0fe88ff9e9.jpg 234w," sizes="100vw" width="2000" height="1335"><div>Cryogenic electron microscopy (cryo-EM) was central to the project. This part of the work was led by Dr. Tomáš Kouba, one of the authors of the study. “Cryogenic electron microscopy allows us to freeze biological molecules in a state very close to their natural form and then determine their three-dimensional structure. This makes it possible to look directly into the active centers of enzymes and observe their function down to the atomic level,” he explains.Last year, IOCB Prague opened a new <a target="_blank" rel="noopener noreferrer" href="https://cryoem.group.uochb.cz/en">cryo-EM center</a> that is unique within the Czech research environment. State-of-the-art cryogenic electron microscopes are housed in a specially designed building and enable the study of biological processes with exceptional structural precision.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/UOCHB_Vyzkum_z_UOCHB_odhaluje_dosud_nepoznany_zpusob_prepisu_geneticke_informace_3_4d881e7a58.jpg" alt="IOCB Prague: Research from IOCB Prague reveals a previously unknown mechanism of genetic transcription: This work shows how NpnNs initiate bacterial transcription. Cryo-EM reveals how nucleobases pair with the template: one in canonical and one in reverse Watson–Crick mode, providing a structural basis for their function as non-canonical RNA caps." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_UOCHB_Vyzkum_z_UOCHB_odhaluje_dosud_nepoznany_zpusob_prepisu_geneticke_informace_3_4d881e7a58.jpg 245w," sizes="100vw" width="2000" height="1077"><blockquote><h4>The Original article</h4><h4><a target="_blank" rel="noopener noreferrer" href="https://www.nature.com/articles/s41589-025-02134-5">Molecular insight into 5′ RNA capping with NpnNs by bacterial RNA polymerase</a></h4>Valentina M. Serianni, Jana Škerlová, Anna Knopp Dubánková, Anton Škríba, Hana Šváchová, Tereza Vučková, Anatolij Filimoněnko, Milan Fábry, Pavlína Řezáčová, Tomáš Kouba &amp; Hana Cahova&nbsp;Nat. Chem. Biol. 21 (2026)<a target="_blank" rel="noopener noreferrer" href="https://doi.org/10.1038/s41589-025-02134-5">https://doi.org/10.1038/s41589-025-02134-5</a><h6>licensed under <a target="_blank" rel="noopener noreferrer" href="https://creativecommons.org/licenses/by/4.0/">CC-BY 4.0</a></h6></blockquote><h4>Abstract</h4>RNA capped with dinucleoside polyphosphates has been discovered in bacteria and eukaryotes only recently. The likely mechanism of this specific capping involves direct incorporation of dinucleoside polyphosphates by RNA polymerase as noncanonical initiating nucleotides. However, how these compounds bind into the active site of RNA polymerase during transcription initiation is unknown. Here, we explored transcription initiation in vitro, using a series of DNA templates in combination with dinucleoside polyphosphates and model RNA polymerase from Thermus thermophilus. We observed that the transcription start site can vary on the basis of the compatibility of the specific template and dinucleoside polyphosphate. Cryo-electron microscopy structures of transcription initiation complexes with dinucleoside polyphosphates revealed that both nucleobase moieties can pair with the DNA template. The first encoded nucleotide pairs in a canonical Watson–Crick manner, whereas the second nucleobase pairs noncanonically in a reverse Watson–Crick manner. Our work provides a structural explanation of how dinucleoside polyphosphates initiate RNA transcription.</div></div>

Research from IOCB Prague reveals a previously unknown mechanism of genetic transcription

In the week of February 9, the following webinars await you in the field of gas / solid phase and especially Raman, FTIR, GC and GC/MS.<blockquote><h4><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/webinars">👉 DETAILS AND REGISTRATION IN THE WEBINARS SECTION</a></h4>👉 Search and filter in the largest global database with over 5 000 GC, LC, MS and spectroscopy webinars.</blockquote><div><div><div><div><div><div><h5>1. Thermo Fisher Scientific: Process Raman – A Reliable and Versatile Tool for Downstream Process Monitoring and Control for mAb Production</h5><ul><li>Tu, 10.2.2026 16:00 CET</li><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/webinar/5808">Registration</a></li></ul>The presentation highlights how process Raman spectroscopy offers several advantages over traditional in-line UV-Vis analysis for process monitoring and metabolite production control in mAb manufacturing.<h5>2. Wasson-ECE Instrumentation: The Data Driven Plant – How AI Transforms Chemical Manufacturing</h5><ul><li>Tu, 10.2.2026 21:30 CET</li><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/webinar/5744">Registration</a></li></ul>Explore how artificial intelligence is applied to improve process efficiency, monitoring, and decision-making in modern chemical manufacturing.<h5>3. New Food Magazine: The Science of Next-Gen Ingredients – Fermentation, Formulation and Function</h5><ul><li>We, 11.2.2026 16:00 CET</li><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/webinar/5720">Registration</a></li></ul>Discover how fermentation-driven innovation is transforming functional food ingredients, with analytical insights to optimize flavour, functionality, and product stability.</div></div></div></div></div></div>

Webinars LabRulezGCMS Week 07/2026

This study presents an analytical strategy combining QuEChERS extraction with low-temperature partitioning (LTP) for the determination of multiclass pesticide residues in cocoa beans by GC–MS. Extraction conditions were optimized using a fractional factorial design, resulting in a simple and efficient workflow suitable for complex cocoa matrices.The validated method showed satisfactory limits of detection and quantification, recoveries within 70–120%, and good overall performance. Application to cocoa samples from Brazil detected permethrin in several samples, demonstrating that the QuEChERS–LTP approach is an effective and reliable cleanup strategy for routine pesticide residue analysis in cocoa.<blockquote><h4>The original article</h4><h4><a target="_blank" rel="noopener noreferrer" href="https://pubs.acs.org/doi/10.1021/acsomega.5c10360">QuEChERS Combined with Low-Temperature Partitioning and GC–MS as an Analytical Strategy for the Determination of Multiclass Pesticide Residues in Cocoa Beans</a></h4>Priscilla M. de Freitas Machado, Madson M. Nascimento, Paulo R. R. Mesquita, Manuela B. Nascimento, Lilian Lefol N. Guarieiro, Gisele O. da Rocha, Jailson B. de Andrade, Raildo M. de Jesus*ACS Omega 2025, 10, 51, 63464–63473<a target="_blank" rel="noopener noreferrer" href="https://doi.org/10.1021/acsomega.5c10360">https://doi.org/10.1021/acsomega.5c10360</a><h6>licensed under <a target="_blank" rel="noopener noreferrer" href="https://creativecommons.org/licenses/by/4.0/">CC-BY 4.0</a></h6></blockquote>Selected sections from the article follow. Formats and hyperlinks were adapted from the original.Cocoa is best known as the primary raw material for chocolate but is also processed into products such as cocoa butter, biscuits, cocoa honey, and cocoa powder. Cocoa powder is derived from roasted, pressed, and milled nibs, containing on average 20% (w/w) lipids on a dry basis and less than 9% moisture. <a href="javascript:void(0);">(3,4)</a>According to the Brazilian Health Regulatory Agency (ANVISA), pesticides such as atrazine, bifenthrin, cyproconazole, metalaxyl, tebuconazole, trifloxystrobin, and permethrin are approved for use in Brazil. <a href="javascript:void(0);">(13)</a> However, among these, only metalaxyl, trifloxystrobin, and tebuconazole are authorized by the European Union. <a href="javascript:void(0);">(14)</a> Thus, investigating these contaminants in cocoa samples is of utmost importance, as Brazil is one of the largest cocoa exporters, supplying cocoa commodities to South America, the United States, and the European Union. <a href="javascript:void(0);">(2)</a> Furthermore, Organochlorine pesticides, in particular, belong to the class of persistent organic pollutants (POPs). Although banned in many countries, they continue to be used in some developing nations because of their chemical stability, resistance to degradation, volatility, and high lipophilicity, which promote bioaccumulation and neurotoxicity. <a href="javascript:void(0);">(15)</a> Epidemiological evidence also associates their exposure with Parkinson’s disease, certain cancers, diabetes, and endometriosis. <a href="javascript:void(0);">(16)</a>Residues of pesticides in cocoa have been reported in various studies. <a href="javascript:void(0);">(17)</a> Analyzing pesticide residues in cocoa presents analytical challenges due to the matrix’s complexity, comprising high lipid content, fatty acids and esters, sugars, polyphenols, and caffeine. These components can interfere with extraction efficiency and contaminate analytical instrumentation. <a href="javascript:void(0);">(18)</a> Therefore, efficient sample preparation methods incorporating effective cleanup steps are essential for accurate residue determination.Several techniques have been employed for multiresidue pesticide analysis in cocoa. For instance, Idowu et al. <a href="javascript:void(0);">(19)</a> quantified 14 organochlorines using Soxhlet extraction and silica/Na2SO4 cleanup, with GC ECD detection. Okoffo et al. <a href="javascript:void(0);">(20)</a> determined 13 organophosphates and 9 pyrethroids employing SPE cartridges (Envi-carb/LC-NH2 and Bond Elute C18), acetonitrile extraction, and GC PFPD or GC ECD quantification. Yusiasih et al. <a href="javascript:void(0);">(21)</a> applied dispersive SPE with PSA, Florisil, and MgSO4 for pyrethroids, followed by GC ECD and GC–MS.Therefore, this study aimed to evaluate the effectiveness of a QuEChERS–LTP analytical procedure for the determination of multiclass pesticide residues in cocoa beans. The factors that affect the QuEChERS–LTP procedure efficiency were optimized. After validation, the procedure was employed to investigate the occurrence of 15 multiclass pesticides in cocoa samples.<h4>Experimental Section</h4><h5>Instrumental Apparatus</h5>Pesticide separation and identification were performed on a Shimadzu <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?mainauthorItems=1&amp;search=GC-MS-QP2010SE">GC-MS-QP2010SE</a> system (Kyoto, Japan) equipped with an <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?mainauthorItems=1&amp;search=AOC-20i">AOC-20i autosampler</a>. Separation was achieved using an <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?mainauthorItems=10&amp;search=DB-5MS">Agilent DB-5MS capillary column</a> (30 m × 0.25 mm × 0.25 μm) with a stationary phase of 5% phenyl/95% dimethylpolysiloxane. The instrumental conditions were based on Nascimento et al. <a href="javascript:void(0);">(49)</a> and they are summarized in <a target="_blank" rel="noopener noreferrer" href="https://pubs.acs.org/doi/10.1021/acsomega.5c10360#tbl4">Table 4</a>.For quantification, the base peak was used, while two additional ions were monitored for confirmation (<a target="_blank" rel="noopener noreferrer" href="https://pubs.acs.org/doi/suppl/10.1021/acsomega.5c10360/suppl_file/ao5c10360_si_001.pdf">Table S2</a>) in accordance with SANTE guidelines. <a href="javascript:void(0);">(50)</a> A GC–MS/SIM chromatogram illustrating the separation of all target pesticides is presented in <a target="_blank" rel="noopener noreferrer" href="https://pubs.acs.org/doi/10.1021/acsomega.5c10360#fig5">Figure 5</a>.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/ACS_Omega_2025_10_51_63464_63473_Figure_5_Extracted_ion_chromatogram_EIC_in_SIM_mode_of_the_target_pesticides_f2461c14f4.jpg" alt="ACS Omega 2025, 10, 51, 63464–63473: Figure 5. Extracted ion chromatogram (EIC) in SIM mode of the target pesticides obtained from the injection of a mixed standard solution at 100 μg L–1. Analytes are listed in order of elution: [1] Molinate (6.18 min); [2] α-HCH (8.15 min); [3] atrazine-d5 (8.69 min); [4] atrazine (8.75 min); [5] diazinon (9.31 min); [6] disulfoton (9.67 min); [7] dimethachlor (10.60 min); [8] metalaxyl (11.25 min); [9] p,p′-DDE (15.82 min); [10] cyproconazole I (16.50 min); [11] cyproconazole II (16.56 min); [12] p,p′-DDD (17.29 min); [13] ethion (17.34 min); [14] trifloxystrobin (18.43 min); [15] tebuconazole (19.13 min); [16] bifenthrin (20.47 min); [17] permethrin I (23.92 min); [18] permethrin II (24.18 min)." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_ACS_Omega_2025_10_51_63464_63473_Figure_5_Extracted_ion_chromatogram_EIC_in_SIM_mode_of_the_target_pesticides_f2461c14f4.jpg 245w," sizes="100vw" width="2080" height="835"><h5>Application of the Proposed Procedure to Real Samples</h5>In a 50 mL Falcon tube, 2.0 g of sample was weighed using an analytical balance (AUX320, Shimadzu, Kyoto, Japan). A total of 2.0 g of salt (NaCl and Na2SO4 in a 1:1 w/w ratio) was added, followed by an aliquot of the atrazine-d5 solution (surrogate standard) to yield a final concentration of 250 μg kg–1. A mixture of acetonitrile (8.0 mL) and ultrapure water (2.0 mL) was then added. The system was vortexed (K40-10208, Kasvi, São Paulo, Brazil) for 3.0 min at 2500 rpm and centrifuged (MPW-351R, MPW Med. Instruments, Warsaw, Poland) for 10.0 min at 15 °C and 10,000 rpm. After phase separation, approximately 6.0 mL of the supernatant was transferred to a Falcon tube containing 150.0 mg of PSA sorbent. The mixture was vortexed again for 3.0 min at 2500 rpm and centrifuged for an additional 10.0 min under the same conditions. The tubes were then placed in the freezer for 24 h. Once the aqueous phase had frozen, the organic extract containing the analytes was collected, filtered through a Cytiva Whatman MiniUniprep G2 vial with a 0.20 μm membrane filter (Marlborough, Massachusetts, USA), and injected into the GC–MS system (<a target="_blank" rel="noopener noreferrer" href="https://pubs.acs.org/doi/10.1021/acsomega.5c10360#fig6">Figure 6</a>).<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/ACS_Omega_2025_10_51_63464_63473_Figure_6_Schematic_representation_of_the_extraction_procedure_using_the_Qu_E_Ch_ERS_LTP_procedure_for_pesticide_extraction_in_cocoa_powder_samples_ed58549bcf.jpg" alt="ACS Omega 2025, 10, 51, 63464–63473: Figure 6. Schematic representation of the extraction procedure using the QuEChERS–LTP procedure for pesticide extraction in cocoa powder samples." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_ACS_Omega_2025_10_51_63464_63473_Figure_6_Schematic_representation_of_the_extraction_procedure_using_the_Qu_E_Ch_ERS_LTP_procedure_for_pesticide_extraction_in_cocoa_powder_samples_ed58549bcf.jpg 223w," sizes="100vw" width="1458" height="1022"><h4>Results and Discussion</h4><h5>Evaluation of the Effect of Low and Ultralow Temperatures on the Analytical Response</h5>Studies reporting the use of LTP generally employ a conventional freezer, which typically reaches −18 ± 2 °C as the minimum temperature. In this equipment, effective phase separation can require 8 to 24 h. <a href="javascript:void(0);">(35−37)</a> In contrast, ultralow temperature freezers (ultrafreezers) can reach −80 °C, leading to a substantial reduction in partitioning time. In this study, tests performed with the conventional freezer achieved satisfactory partitioning after 24 h, whereas in the ultrafreezer, complete partitioning was observed in only 20 min.Considering the analytical response in terms of peak area (<a target="_blank" rel="noopener noreferrer" href="https://pubs.acs.org/doi/10.1021/acsomega.5c10360#fig3">Figure 3</a>), higher signals were obtained when LTP was performed in a conventional freezer rather than an ultrafreezer. This behavior can be attributed to the partitioning mechanism. <a href="javascript:void(0);">(32)</a> Partitioning depends on cooling and the subsequent freezing of the aqueous phase. In the conventional freezer, the slower freezing rate provides sufficient time for the system to approach thermodynamic equilibrium, favoring analyte diffusion between phases. Under these conditions, analyte molecules have more time to migrate and distribute optimally before complete solidification. In contrast, the rapid freezing in the ultrafreezer may trap analytes in a nonideal distribution, reducing the efficiency of the partitioning process <a href="javascript:void(0);">(32)</a> (<a target="_blank" rel="noopener noreferrer" href="https://pubs.acs.org/doi/10.1021/acsomega.5c10360#fig3">Figure 3</a>). According to these observations, the conventional freezer was selected for subsequent experiments.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/ACS_Omega_2025_10_51_63464_63473_Figure_3_Comparison_of_chromatographic_peak_areas_of_pesticides_after_partitioning_in_the_conventional_freezer_versus_the_ultrafreezer_9598bcfec3.jpg" alt="ACS Omega 2025, 10, 51, 63464–63473: Figure 3. Comparison of chromatographic peak areas of pesticides after partitioning in the conventional freezer versus the ultrafreezer." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_ACS_Omega_2025_10_51_63464_63473_Figure_3_Comparison_of_chromatographic_peak_areas_of_pesticides_after_partitioning_in_the_conventional_freezer_versus_the_ultrafreezer_9598bcfec3.jpg 175w," sizes="100vw" width="996" height="891"><h5>Application to Real Samples</h5>Fifteen samples were analyzed in triplicate, comprising two from the State of Pará and 12 from the State of Bahia, located in the North and Northeast regions of Brazil, respectively. Among the 15 pesticides investigated, only permethrin isomers were quantified in four samples (<a target="_blank" rel="noopener noreferrer" href="https://pubs.acs.org/doi/10.1021/acsomega.5c10360#tbl3">Table 3</a>). The herbicide molinate was also detected in three samples; however, its concentration was below LOQ. Permethrin isomers concentrations ranged from 17.1 ± 0.3 to 49.6 ± 1.8 μg kg–1. These values are below the MRL established by European Union regulation, which is 100 μg kg–1. <a href="javascript:void(0);">(42)</a> Although permethrin is not permitted in the European Union, <a href="javascript:void(0);">(42)</a> it remains authorized for use as insecticide in Brazil, particularly in crops such as cotton, rice, coffee, citrus, cabbage, beans, tobacco, maize, soybean, tomato, wheat, and grape. <a href="javascript:void(0);">(13)</a> However, no MRL values have been established for cocoa beans under Brazilian legislation. <a href="javascript:void(0);">(13)</a> <a target="_blank" rel="noopener noreferrer" href="https://pubs.acs.org/doi/10.1021/acsomega.5c10360#tbl3">Table 3</a> shows the concentration of detected compounds in the cocoa samples.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/ACS_Omega_2025_10_51_63464_63473_Table_3_Mean_Concentrations_mg_kg_1_Standard_Deviation_of_Target_Pesticides_Detected_in_This_Study_2427955699.jpg" alt="ACS Omega 2025, 10, 51, 63464–63473: Table 3. Mean Concentrations (μg kg–1 ± Standard Deviation) of Target Pesticides Detected in This Study" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_ACS_Omega_2025_10_51_63464_63473_Table_3_Mean_Concentrations_mg_kg_1_Standard_Deviation_of_Target_Pesticides_Detected_in_This_Study_2427955699.jpg 196w," sizes="100vw" width="1070" height="851">To assess method performance for pesticides not detected in the cocoa samples, one of the analyzed samples was fortified with a mixed standard solution at concentrations of 50, 250, and 500 μg kg–1. The fortified analytes were subsequently detected in the chromatograms presented in <a target="_blank" rel="noopener noreferrer" href="https://pubs.acs.org/doi/suppl/10.1021/acsomega.5c10360/suppl_file/ao5c10360_si_001.pdf">Figures S2–S4</a>, indicating good response of the proposed method.<h4>Conclusions</h4>The QuEChERS–LTP procedure was successfully developed for the determination of 16 multiclass pesticide residues in cocoa beans. For the first time, ultralow temperature (−80 °C) was applied to accelerate the low-temperature partitioning process during pesticide extraction from cocoa beans. Nevertheless, conventional freezing at −12 °C proved to be more effective for the extraction of the target analytes.Evaluation of the matrix effect demonstrated that matrix-matched analytical curves, constructed in an analyte-free cocoa bean extract, were more effective in compensating for matrix interferences than the use of analyte protectants.The pyrethroid permethrin was quantified in four cocoa samples. However, the concentrations did not exceed the MRL established by European Union legislation.Overall, the QuEChERS–LTP procedure proved to be a promising approach for pesticide residue determination, as it requires smaller volumes of solvents and reagents, involves fewer cleanup and extraction steps, and shows strong potential for application to other complex matrices.

QuEChERS Combined with Low-Temperature Partitioning and GC–MS as an Analytical Strategy for the Determination of Multiclass Pesticide Residues in Cocoa Beans

Article

Webinars

Food

Scientific article

Science and research

Video

The Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences (IOCB Prague) is a leading scientific institution in the Czech Republic, recognized internationally. Its primary mission is basic research in the fields of chemical biology and medicinal chemistry, organic and material oriented chemistry, chemistry of natural compounds, biochemistry and molecular biology, physical chemistry, theoretical chemistry, and analytical chemistry. 

Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences

Everything from the world of analytical chemistry in one place. We connect people in solving their problems. At Labrulez you will find all the necessary information easily, quickly and clearly. Stop searching and start finding.

LabRulez

Mestrelab Mnova Gears – Fraction Analysis software

The tool will evaluate the number and size of peaks present in each fraction, match and assign your target peak, calculate its purity, then score and report the results automatically.

<h3>Automated evaluation of collected elution fractions for decision making</h3>
To pool or not to pool? This may be a tricky question when more than one fraction has been collected for your sample during preparative chromatography.
Fraction Analysis will help you answer it quickly by automating the analysis of fractions and suggesting the most appropriate action to take. The tool will evaluate the number and size of peaks present in each fraction, match and assign your target peak, calculate its purity, then score and report the results automatically. After Fraction Analysis, you will be able to quickly review the results dashboard and pass the selected fraction to downstream quality control processes.
<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Mestrelab_Research_Mnova_Gears_Fraction_Analysis_software_Improve_your_chromatography_outcome_by_taking_informed_decisions_on_pooling_b5ede04d20.jpg" alt="Mestrelab Research: Mnova Gears - Fraction Analysis software: Improve your chromatography outcome by taking informed decisions on pooling, or otherwise, the eluate fractions!"/>
<blockquote>
<h3><a href="http://www2.mestrelab.com/l/271522/2024-03-25/3nwskm">Visit MestreLab Research Mnova Gears – Fraction Analysis product page to learn more!</a></h3>
</blockquote>
<h3>Fraction Analysis Benefits</h3>
<ul>
<li>Huge time savings on spectral data analysis and preparation of professional-looking reports with the results</li>
<li>Reduce the risk of pooling a pure eluate fraction with a poor-quality one</li>
<li>Bring insight into the results and decide whether to stick to the suggested action or manually override it</li>
</ul>
<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Mestrelab_Research_Mestrelab_Mnova_Gears_Chrom_Best_Method_software_2_8cff8a724b.jpg" alt="Mestrelab Research: Mestrelab Mnova Gears – Fraction Analysis software."/>
<h3>Fraction Analysis Features</h3>
<ul>
<li>Automated data ingestion, processing, analysis, and report generation</li>
<li>Powerful scoring based on peak number, size, and target mass purity</li>
<li>Flexible analysis options</li>
<li>Color coded dashboards and tables with analysis results</li>
<li>Automatic, data-driven suggestion for subsequent action (to keep and QC, or dispose of or review the elution fraction)</li>
<li>Possibility to override the automatically generated results</li>
<li>Summary CSV output with results that can be used as input files for the next-stage analysis</li>
</ul>
<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Mestrelab_Research_Mnova_Gears_Fraction_Analysis_software_1_d59b34f8a9.jpg" alt="Mestrelab Research: Mestrelab Mnova Gears - Fraction Analysis software."/>
<h3>Purification Workflow</h3>
<h4>More Automation</h4>
Looking for an enterprise-level solution for improving your purification and data management procedures? Check the <a href="http://www2.mestrelab.com/l/271522/2024-03-25/3nwskj">Best Method</a> and <a href="http://www2.mestrelab.com/l/271522/2024-03-25/3nwskq">Quality Control</a> bricks that also run in full automation, and learn more about our automated databasing solution with Mgears. You have the complete flexibility to combine and adapt these solutions to your standard procedures to reap even more benefits for your organization.
<a href="http://www2.mestrelab.com/l/271522/2024-04-10/3p2gsh">Contact us</a> for more information.
<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Mestrelab_Research_Mestrelab_Mnova_Gears_Chrom_Best_Method_software_4_f25f63daa7.jpg" alt="Mestrelab Research: Mestrelab Mnova Gears – Fraction Analysis software."/>
<h3>Markets</h3>
Academic, Government &amp; Industrial
<h4>Who should be using Fraction Analysis?</h4>
Organic chemists, analysts, QC experts, and researchers using quantitative chromatographic methods for quality control, concentration/purity determination, or monitoring/optimization of reactions in one of the following markets and applications:
<ul>
<li>Pharmaceutical/Drug development industry</li>
<li>Food &amp; Beverage industries</li>
<li>Personal care and Cosmetics</li>
<li>Fine chemical synthesis industries</li>
<li>Polymer industries</li>
<li>Academic research laboratories</li>
<li>Contract Research Organizations (CROs) offering purification services</li>
<li>Compound purification for subsequent use in studies or commercialization</li>
<li>Isolation of unknown impurities in finished products, natural products, or in the environment for structural disclosure, study, etc.</li>
<li>Chiral separation to remove unwanted enantiomers obtained during organic synthesis</li>
</ul>

Mestrelab Mnova Gears – Chrom QC software

This automation tool will run end-to-end QC workflows for you and deliver decision-enabling reports with all the results you’ll need.

<h3>Automated workflow for high throughput quality control using LC/GC-MS</h3>
Compound quality control can be challenging and time consuming when manual input for processing or result interpretation is needed. If you are an organic chemist, medicinal chemist, formulation scientist, or a quality specialist and want to analyze your compound libraries to assert compound identity and assess purity, Chrom QC is your best ally. This automation tool will run end-to-end QC workflows for you and deliver decision-enabling reports with all the results you’ll need.
Chrom QC runs on the Gears automation engine, which means that any LC/GC-MS format can be handled independently from the instrument software packages. Data is automatically retrieved from your directories (in batches or real time), matched to the corresponding molecular structures, formulae, masses, etc., and analyzed to confirm compound identity and determine purities. Custom csv, html, mnova, and PDF reports can also be automatically generated, and results can be sent directly to your database! Even better, all of this can be achieved with only minimal setup effort!
<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Mestrelab_Research_Mestrelab_Mnova_Gears_Chrom_QC_software_All_your_purity_analyses_in_a_single_software_package_ff88cd29f6.jpg" alt="Mestrelab Research: Mestrelab Mnova Gears – Chrom QC software: All your purity analyses in a single software package!"/>
<blockquote>
<h3><a href="http://www2.mestrelab.com/l/271522/2024-03-25/3nwskq">Visit MestreLab Research Mnova Gears – Chrom QC product page to learn more!</a></h3>
</blockquote>
<h3>Chrom QC Benefits</h3>
<ul>
<li>Quality control all your compounds using one software package that supports all the major proprietary LC-MS data formats – make your quality control independent of the devices used!</li>
<li>Streamline your lot and batch release programs by automating data processing, analysis, and report generation</li>
<li>High-quality data in a timely manner to enhance your lab productivity</li>
<li>Effective result visualization with possible manual review</li>
<li>Save your compound results in your Mnova databases on-the-fly</li>
</ul>
<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Mestrelab_Research_Mestrelab_Mnova_Gears_Chrom_Best_Method_software_2_8cff8a724b.jpg" alt="Mestrelab Research: Mestrelab Mnova Gears – Chrom QC software."/>
<h3>Chrom QC Features</h3>
<ul>
<li>Support to the majority of <a href="http://www2.mestrelab.com/l/271522/2024-04-10/3p2gs6">LC/GC-MS data formats</a></li>
<li>Automatic detection and matching of input data files with provided information</li>
<li>Flexible peak identification methods using molecular structures, formulae and masses, or peak size</li>
<li>Possible extraction of multiple traces for purity and concentration calculations</li>
<li>Automated reporting with customization options and use of design templates (html, mnova, PDF, csv)</li>
<li>Color-coded plate view to enable review-by-exception of the results</li>
<li>Manual peak selection tool for result correction</li>
<li>Automatic result archiving and databasing</li>
</ul>
<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Mestrelab_Research_Mestrelab_Mnova_Gears_Chrom_QC_software_d27c9333ee.jpg" alt="Mestrelab Research: Mestrelab Mnova Gears – Chrom QC software."/>
<h3>Purification Workflow</h3>
<h4>More Automation</h4>
Looking for an enterprise-level solution for improving your purification and data management procedures? Check the <a href="http://www2.mestrelab.com/l/271522/2024-03-25/3nwskj">Best Method</a> and <a href="http://www2.mestrelab.com/l/271522/2024-03-25/3nwskm">Fraction Analysis</a> bricks that also run in full automation, and learn more about our automated databasing solution with Mgears. You have the complete flexibility to combine and adapt these solutions to your standard procedures to reap even more benefits for your organization.
<a href="http://www2.mestrelab.com/l/271522/2024-04-10/3p2gsh">Contact us</a> for more information.
<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Mestrelab_Research_Mestrelab_Mnova_Gears_Chrom_Best_Method_software_4_f25f63daa7.jpg" alt="Mestrelab Research: Mestrelab Mnova Gears – Chrom QC software."/>
<h3>Markets</h3>
Academic, Government &amp; Industrial
<h4>Who should be using Chrom QC?</h4>
Organic chemists, analysts, QC experts, and researchers using quantitative chromatographic methods for quality control, concentration/purity determination, or monitoring/optimization of reactions in one of the following markets and applications:
<ul>
<li>Pharmaceutical/Drug development industry</li>
<li>Food &amp; Beverage industries</li>
<li>Personal care and Cosmetics</li>
<li>Fine chemical synthesis industries</li>
<li>Polymer industries</li>
<li>Academic research laboratories</li>
<li>Contract Research Organizations (CROs)</li>
<li>Quality control of synthesized or acquired compounds prior to registration</li>
<li>Quality control of compound collections prior to use in biological assays</li>
<li>Quality control of finished compounds prior release to the market (drugs, food additives, preservatives, etc.)</li>
<li>Quality control for formulation optimization and definition of storage recommendations</li>
</ul>

Mestrelab Mnova Gears – Affinity Screen software

Automated software tool for processing data from affinity selection mass spectrometry assays.

<h3>Automated solution for affinity selection mass spectrometry data processing, interpretation, and hit identification</h3>
Automated software tool for processing data from affinity selection mass spectrometry assays, where large libraries of compounds are tested against a target protein or other macromolecules (DNAs/RNAs) using a multiplexed approach.
The Affinity Screen software sorts input data files, processes the data, and compares the results from “free” and “bound” states to determine whether a molecule binds to a target or not. It generates human-readable reports where hits can be quickly identified and reviewed by experts to confirm positive result.
<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Mestrelab_Research_Mestrelab_Mnova_Gears_Affinity_Screen_software_Analyze_up_to_1_M_compounds_in_a_single_click_ee4ab26bc5.jpg" alt="Mestrelab Research: Mestrelab Mnova Gears – Affinity Screen software - Analyze up to 1M compounds in a single click!"/>
<blockquote>
<h3><a href="http://www2.mestrelab.com/l/271522/2024-03-25/3nwskt">Visit MestreLab Research Mnova Gears – Affinity Screen product page to learn more!</a></h3>
</blockquote>
<h3>Affinity Screen Benefits</h3>
<ul>
<li>Analyze affinity selection MS data from any LCMS instrument, regardless of the format</li>
<li>Customize and streamline the analysis process from data pick up to results reporting and archiving</li>
<li>Empower less experienced users to independently perform affinity selection MS assays and obtain results</li>
<li>Minimize errors and enhance efficiency by reducing manual input</li>
<li>Accelerate lead discovery by screening up to 1M compounds with a single click</li>
<li>Maintain control over data quality by setting controls and flags for result assessment</li>
<li>Save time on routine and irrelevant data analysis, enabling a focus on innovation and decision-making</li>
</ul>
<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Mestrelab_Research_Mestrelab_Mnova_Gears_Chrom_Best_Method_software_2_8cff8a724b.jpg" alt="Mestrelab Research: Mestrelab Mnova Gears – Affinity Screen software."/>
<h3>Affinity Screen Features</h3>
<ul>
<li>Customizable configuration for picking up and sorting hundreds of datasets containing data for target-free, +target, and -target samples for each compound mixture with a single click</li>
<li>Flexibility to define criteria for peak detection and hit scoring</li>
<li>Ability to review and interact with results, revise, and recalculate as needed</li>
<li>Traffic light system indicating the presence or absence of hits in a well</li>
<li>Detailed results for each hit displayed on a separate page with stacked EICs (Extracted Ion Chromatograms)</li>
<li>Generation of multiple and customizable outputs, automatically archived (reports can be generated in the user’s desired format, filtering data by target, compound, hit score, etc.)</li>
<li>Results warnings and commenting</li>
<li>Flexible setup and robust integration capability with other laboratory systems</li>
</ul>
<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Mestrelab_Research_Mestrelab_Mnova_Gears_Affinity_Screen_software_1_9a42987909.jpg" alt="Mestrelab Research: Mestrelab Mnova Gears – Affinity Screen software."/>
<h3>Markets</h3>
Academic, Government &amp; Industrial
<h4>Who should be using Affinity Screen?</h4>
<ul>
<li>Drug discovery laboratories</li>
<li>Natural product research</li>
<li>Food and beverage industries</li>
<li>Personal care and cosmetics</li>
<li>Fine chemical synthesis industries</li>
<li>Polymer industries</li>
<li>Research laboratories</li>
<li>Contract Research Organizations (CROs) and other research service providers</li>
<li>Compound library screening for hit identification and lead discovery</li>
<li>Screening natural compounds, polymer-based biomaterials, food additives, etc., to identify their binding to a target protein</li>
</ul>

SciY Mnova Gears – Chrom Reaction Optimization software

With this new  Automated Software Solution for Chemical Reaction Optimization from Mnova Gears, determining the ideal reaction conditions becomes an easy, hassle-free, and quick task.

<h3>Automated Software Solution for Chemical Reaction Optimization</h3>With this new Automated Software Solution for Chemical Reaction Optimization from Mnova Gears, determining the ideal reaction conditions becomes an easy, hassle-free, and quick task. Chrom Reaction Optimization allows you to track a defined set of chemicals across multiple parallel reactions to compare their levels and conclude on the best experimental conditions to employ.Set up your workflow from data pick-up to results drop-off, and scale it up as needed. Results are matched to the designed experimental points and are delivered in many formats including graphical visuals to enable quick and informed decision making.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Mestrelab_Research_Mestrelab_Mnova_Gears_Chrom_Reaction_Optimization_software_Automate_data_processes_to_quickly_find_the_safest_most_efficient_c5ed26927d.jpg" alt="Mestrelab Research: Mestrelab Mnova Gears – Chrom Reaction Optimization software: Automate data processes to quickly find the safest, most efficient, cost-effective synthetic schemes for your reactions."><blockquote><h3><a target="_blank" rel="noopener noreferrer" href="http://www2.mestrelab.com/l/271522/2024-03-25/3nwsl1">Visit Mnova Gears – Chrom Reaction Optimization product page to learn more!</a></h3></blockquote><h3>Chrom Reaction Optimization Highlights</h3><ul><li>Seamless handling of large chromatography datasets removing bottleneck related to high throughput experimentation approaches</li><li>Robust and repetitive data management workflows that will replace the tedious manual processing required for each sample</li><li>Huge time saving by enabling review-by-exception strategy</li><li>Control over results quality and easy detection and correction of errors that may occur during processing and analysis</li><li>Quick and confident decision making based on global and graphical reports with the analysis results</li><li>Structured analytical data reporting and archiving to comply with standards</li></ul><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Mestrelab_Research_Mestrelab_Mnova_Gears_Chrom_Reaction_Optimization_software_features_a3c019c8e9.jpg" alt="Mestrelab Research: Mestrelab Mnova Gears – Chrom Reaction Optimization software features."><h3>Chrom Reaction Optimization Features</h3><h4>Fully customizable and reusable analysis methods</h4><h5>Reaction optimization input, data processing, analysis, reporting and results archiving is fully customizable to fit your needs.</h5>Reaction optimization runs with the Mnova Gears platform and therefore benefits from the huge flexibility in input configuration which allows you to adapt analysis to your own data organization and formats. Input can come from disk directories or from the instrument in real time acquisition, and can be organized in many different ways. Mgears can be set to recognize and pick up the data for the analysis.<h5>On the other hand, analysis options can be customized:</h5><ul><li>Components to track/ignore</li><li>Compound matching options using structure or retention times</li><li>Analysis thresholds and controls, etc</li></ul>All analysis options can be saved, shared, and re-used in the future which allows huge time savings and robustness in the process.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Mestrelab_Research_Mestrelab_Mnova_Gears_Chrom_Reaction_Optimization_software_Fully_customizable_and_reusable_analysis_methods_ad6b3b966c.jpg" alt="Mestrelab Research: Mestrelab Mnova Gears – Chrom Reaction Optimization software: Fully customizable and reusable analysis methods."><h4>Flag system for warnings about non-conformances</h4>Analysis criteria can be defined by experts and colored flags configured to get warnings when sample analysis does not fulfill the specified requirements. For instance, a sample can be flagged when no peaks are detected, when component peaks overlap, and/or when RT variation exceeds an acceptable threshold.Detecting these non-conformances is crucial to keep control over results quality. You can review the flagged sample in the Result Viewer to investigate the problem, easily correct peak assignments if needed, and re-analyze samples to update the results.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Mestrelab_Research_Mestrelab_Mnova_Gears_Chrom_Reaction_Optimization_software_Flag_system_for_warnings_about_non_conformances_60517716c1.jpg" alt="Mestrelab Research: Mestrelab Mnova Gears – Chrom Reaction Optimization software: Flag system for warnings about non-conformances."><h4>Graphical summary of results and automatic global reports</h4>Chrom Reaction Optimization simplifies decision making by generating global and graphical reports with the analysis results. Reports are generated in multiple formats, including a dynamic html format that allows data sorting (increasing or decreasing order) and export to new reports.Quantities of reaction starting materials, products, and other declared compounds are graphically represented in charts making it easier to decide on the best reaction conditions at a glance!<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Mestrelab_Research_Mestrelab_Mnova_Gears_Chrom_Reaction_Optimization_software_Graphical_summary_of_results_and_automatic_global_reports_c5976ac1f6.jpg" alt="Mestrelab Research: Mestrelab Mnova Gears – Chrom Reaction Optimization software: Graphical summary of results and automatic global reports."><h3>Markets</h3>Academic, Government &amp; Industrial<h4>Who should be using Chrom Reaction Optimization?</h4>This Automated Software Solution for Chemical Reaction Optimization is suitable for all Organic, medicinal, and process chemists, in the following market fields:<ul><li>(bio)Pharmaceutical / Drug development and manufacturing</li><li>Food &amp; Bev industries / Synthesis of additives, flavors, etc.</li><li>Personal care and Cosmetics industry / Synthesis of preservatives, fragrances, emulsifiers, etc.</li><li>Agrochemical industry/ Synthesis of herbicides, insecticides, etc.</li><li>Polymers industry / Synthesis of new polymers</li><li>Other fine chemicals industries</li></ul>

LECO PEGASUS BTX GC-TOFMS

Discover the LECO Pegasus BTX GC-TOFMS: next-generation TOF technology with femtogram sensitivity, StayClean® ion source, and full-spectrum acquisition for GC and GC×GC applications.

The Pegasus BTX represents the culmination of nearly 30 years of LECO innovation in time-of-flight mass spectrometry for GC and GC×GC applications. Designed for laboratories that demand uncompromising sensitivity, speed, and robustness, the BTX delivers full-spectrum data at all times—even during targeted analyses—so no chemical information is ever lost.<h3>Why Pegasus BTX?</h3>See Everything, All the Time Collect complete mass range data while running targeted methods. Never miss unknowns or unexpected components hidden in complex matrices.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/LECO_LECO_PEGASUS_BTX_GC_TOFMS_Collect_full_mass_range_data_even_when_performing_targeted_analyses_Never_miss_another_clue_ee49884729.jpg" alt="LECO PEGASUS BTX GC-TOFMS: Collect full mass range data, even when performing targeted analyses. Never miss another clue..jpg" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_LECO_LECO_PEGASUS_BTX_GC_TOFMS_Collect_full_mass_range_data_even_when_performing_targeted_analyses_Never_miss_another_clue_ee49884729.jpg 245w," sizes="100vw" width="771" height="350">Advanced Deconvolution Algorithms Powerful spectral deconvolution extracts clean, interpretable spectra—even from the densest chromatograms.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/LECO_LECO_PEGASUS_BTX_GC_TOFMS_Even_in_the_densest_of_matrices_uncovering_analytes_is_easier_than_ever_with_the_help_of_clean_spectra_0a5a1afa9b.jpg" alt="LECO PEGASUS BTX GC-TOFMS: Even in the densest of matrices, uncovering analytes is easier than ever with the help of clean spectra..jpg" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_LECO_LECO_PEGASUS_BTX_GC_TOFMS_Even_in_the_densest_of_matrices_uncovering_analytes_is_easier_than_ever_with_the_help_of_clean_spectra_0a5a1afa9b.jpg 245w," sizes="100vw" width="712" height="350">StayClean® Ion Source – No Routine Cleaning The proven StayClean® direct-extraction EI source eliminates the need for source cleaning, even after prolonged exposure to heavy matrices, maximizing uptime.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/LECO_LECO_PEGASUS_BTX_GC_TOFMS_Stay_running_with_the_Stay_Clean_ion_source_which_requires_no_cleaning_even_after_sustained_heavy_matrix_exposure_8954521617.jpg" alt="LECO PEGASUS BTX GC-TOFMS: Stay running with the StayClean­® ion source, which requires no cleaning, even after sustained heavy matrix exposure..jpg" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_LECO_LECO_PEGASUS_BTX_GC_TOFMS_Stay_running_with_the_Stay_Clean_ion_source_which_requires_no_cleaning_even_after_sustained_heavy_matrix_exposure_8954521617.jpg 245w," sizes="100vw" width="729" height="350">Sensitivity in Spades Achieve trace-level detection down to femtogram levels using either helium or hydrogen carrier gas.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/LECO_LECO_PEGASUS_BTX_GC_TOFMS_Trace_level_detection_with_helium_or_hydrogen_carrier_gases_no_analytes_escape_detection_d3eb2da878.jpg" alt="LECO - LECO PEGASUS BTX GC-TOFMS -Trace-level detection with helium or hydrogen carrier gases - no analytes escape detection.jpg" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_LECO_LECO_PEGASUS_BTX_GC_TOFMS_Trace_level_detection_with_helium_or_hydrogen_carrier_gases_no_analytes_escape_detection_d3eb2da878.jpg 245w," sizes="100vw" width="711" height="350">New Generation TOF Technology A novel ion path and detector design delivers extraordinary sensitivity in a compact benchtop footprint—revealing analytes that escape conventional GC-MS systems.Built for Reliability Backed by LECO’s commitment to robustness, every BTX includes a two-year detector warranty, underscoring confidence in ion path and detector integrity.<h3>Proven Platform, Elevated Performance</h3>Building on more than 8 years of field-proven Pegasus BT systems, the BTX retains what users trust—<a target="_blank" rel="noopener noreferrer" href="https://www.leco.com/documents/app-notes/203-821-569/?_gl=1*121vl09*_up*MQ..*_ga*OTgyMzg3MTkuMTc2NzgxMTMwNA..*_ga_KRDSR1XM7X*czE3Njc4MTEzMDQkbzEkZzAkdDE3Njc4MTEzMDQkajYwJGwwJGgw*_ga_K8NYKVEKHY*czE3Njc4MTEzMDQkbzEkZzAkdDE3Njc4MTEzMDQkajYwJGwwJGgxNjI1OTMyNjA5">StayClean® ion source</a>, ultrafast full-spectrum acquisition, and 5 orders of linear dynamic range—while pushing sensitivity and performance to a new level. It is ideally suited for demanding, non-targeted and discovery-driven workflows across:<ul><li><a target="_blank" rel="noopener noreferrer" href="https://www.leco.com/applications/petrochemical-analysis/?_gl=1*1819onr*_up*MQ..*_ga*OTgyMzg3MTkuMTc2NzgxMTMwNA..*_ga_KRDSR1XM7X*czE3Njc4MTEzMDQkbzEkZzAkdDE3Njc4MTEzMDQkajYwJGwwJGgw*_ga_K8NYKVEKHY*czE3Njc4MTEzMDQkbzEkZzAkdDE3Njc4MTEzMDQkajYwJGwwJGgxNjI1OTMyNjA5">Petroleum &amp; energy</a></li><li><a target="_blank" rel="noopener noreferrer" href="https://www.leco.com/industry/agriculture-environmental/?_gl=1*o0u7vp*_up*MQ..*_ga*OTgyMzg3MTkuMTc2NzgxMTMwNA..*_ga_KRDSR1XM7X*czE3Njc4MTEzMDQkbzEkZzAkdDE3Njc4MTEzMDQkajYwJGwwJGgw*_ga_K8NYKVEKHY*czE3Njc4MTEzMDQkbzEkZzAkdDE3Njc4MTEzMDQkajYwJGwwJGgxNjI1OTMyNjA5">Environmental analysis</a></li><li><a target="_blank" rel="noopener noreferrer" href="https://www.leco.com/applications/metabolomics/?_gl=1*1ttdc4g*_up*MQ..*_ga*OTgyMzg3MTkuMTc2NzgxMTMwNA..*_ga_KRDSR1XM7X*czE3Njc4MTEzMDQkbzEkZzAkdDE3Njc4MTEzMDQkajYwJGwwJGgw*_ga_K8NYKVEKHY*czE3Njc4MTEzMDQkbzEkZzAkdDE3Njc4MTEzMDQkajYwJGwwJGgxNjI1OTMyNjA5">Life sciences</a></li><li><a target="_blank" rel="noopener noreferrer" href="https://www.leco.com/industry/pharma/?_gl=1*121vl09*_up*MQ..*_ga*OTgyMzg3MTkuMTc2NzgxMTMwNA..*_ga_KRDSR1XM7X*czE3Njc4MTEzMDQkbzEkZzAkdDE3Njc4MTEzMDQkajYwJGwwJGgw*_ga_K8NYKVEKHY*czE3Njc4MTEzMDQkbzEkZzAkdDE3Njc4MTEzMDQkajYwJGwwJGgxNjI1OTMyNjA5">Pharmaceuticals</a></li><li><a target="_blank" rel="noopener noreferrer" href="https://www.leco.com/industry/food-safety/?_gl=1*121vl09*_up*MQ..*_ga*OTgyMzg3MTkuMTc2NzgxMTMwNA..*_ga_KRDSR1XM7X*czE3Njc4MTEzMDQkbzEkZzAkdDE3Njc4MTEzMDQkajYwJGwwJGgw*_ga_K8NYKVEKHY*czE3Njc4MTEzMDQkbzEkZzAkdDE3Njc4MTEzMDQkajYwJGwwJGgxNjI1OTMyNjA5">Food safety</a></li><li>Forensic and other complex-matrix applications</li></ul><h3>Key Technical Specifications</h3><ul><li>Ionization Source: Electron Ionization (StayClean® direct-extraction, open style)</li><li>Mass Analyzer: Time-of-Flight with dual-stage single reflectron</li><li>Detector: Scintillator–Photomultiplier Tube (extended lifetime)</li><li>Mass Range: 10–1500 m/z</li><li>Mass Resolution: &gt;1,100 at m/z 219</li><li>Spectral Acquisition Rate: 1–500 spectra/s (up to 35,000 transients/s)</li><li>Detection Limit (He carrier gas): 10 fg OFN, Quant S/N &gt;10</li><li>Detection Limit (H₂ carrier gas): 10 fg OFN, Quant S/N &gt;10</li><li>IDL: &lt;4 fg (8 replicates of 10 fg OFN)</li><li>Precision: &lt;5 % RSD (15 injections of 100 fg OFN)</li><li>Linear Dynamic Range: 5 orders of magnitude</li></ul>

Wasson GC O-FID Oxygenated Components in Gasoline Analyzer

Using an Agilent Technologies 8890 with custom Wasson-ECE hardware, this instrument rapidly determines oxygenate components in motor fuels.

Approved for determining oxygenates in gasoline and other motor fuels by ASTM D5599 and EN 1601
The determination of oxygenates in motor fuels is an important mandate of the reformulated fuels program. To meet this goal, the United States Environmental Protection Agency approved the use of Oxygenate Flame Ionization Detector (O-FID) analysis in preference to other analyses currently used by the fuels industry.
<h5>Oxygen Selectivity</h5>
Using an Agilent Technologies 8890 GC with custom Wasson-ECE hardware, this instrument rapidly determines oxygenate components in motor fuels. A single injection is introduced onto a capillary column which separates oxygenate components in boiling point order. A cracking reactor converts hydrocarbons into elemental carbon, and oxygenated compounds into carbon monoxide. A methanizer then further converts the carbon monoxide into methane before eluting to the FID detector.
Because hydrocarbons never make it to the detector, this method completely eliminates problems with hydrocarbon interferences.
<h5>Single GC 8890 Instrument Configurations:</h5>
<ul>
<li>ASTM D5599 or EN1601 - Oxygenates in gasoline and other motor fuels by O-FID.
</li>
<li>O-FID with D3606 - Oxygenates by O-FID per ASTM D5599 and benzene and toluene in motor fuels by FID per ASTM D3606
</li>
<li>O-FID with D4815 - Oxygenates by O-FID per ASTM D5599 and oxygenates by FID per ASTM D4815
</li>
<li>O-FID with D4815 and D3606 - Oxygenates by O-FID per ASTM D5599, oxygenates by FID per D4815, and benzene and toluene by FID per ASTM D3606
</li>
</ul>
<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Altium_International_Wasson_O_FID_GC_analyzator_kyslikatych_latek_Ukazkovy_chromatogram_z_O_FI_Du_32e439263e.jpg" alt="Wasson: Example chromatogram from O-FID GC system"/>
<h5>Simple to Use and Operate</h5>
The Wasson-ECE O-FID has been engineered to provide long life and require infrequent service. When replacement of the cracking reactor or methanizer is necessary, the task can be accomplished in under one hour, including instrument equilibration time.
<h5>Precise Analyses</h5>
Repeatibility tests yield relative standard deviations (RSD) of approximately 1% by weight over a series of 10 runs for all major oxygenated components. The O-FID response is linear over four orders of magnitude. An automated injection device is recommended to provide the most reliable means of repeatable injection.
<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Altium_International_Wasson_O_FID_GC_analyzator_kyslikatych_latek_Opakovatelnost_mereni_51c93d3988.jpg" alt="Wasson: GC O-FID Oxygenated Components in Gasoline Analyzer - Repeatibility tests"/>

Wasson-ECE GC RGA Refinery Gas Analyzers

Wasson-ECE Refinery Gas Analyzers (RGA) are an integral part of any HPI lab. 

Wasson-ECE Refinery Gas Analyzers (RGA) are an integral part of any HPI lab. These instruments often carry the heaviest sample loads because of the critical information they provide. RGAs provide valuable information regarding plant operation, unit optimization, and quality control. Our RGA systems are designed for flexibility while maintaining the accurate and repeatable results our clients have come to expect.
As a premier channel partner of Agilent Technologies, Wasson-ECE extends the capabilities of the 8890 Gas Chromatograph to meet key requirements of refinery gas analysis. The Wasson-ECE RGA incorporates our specially designed auxiliary oven, which holds up to five additional rotary valves and six columns, extending the analysis capabilities far beyond traditional methods.
At Wasson-ECE we strive to produce a product that is innovative and state-of-the-art to help our customers overcome their analytical challenges. The flexibility of our RGA systems can ease bench space issues by combining analyses into a single instrument while maintaining an easy to service system with minimal downtime.
<h3>RGA Features</h3>
<ul>
<li>Complete range of analyzers for refinery and other petroleum gases and liquids
</li>
<li>vIncludes method development, selection of valves, and columns** in all configurations
</li>
<li>Dual TCDs and a single FID for the simultaneous analysis of fixed gases and hydrocarbons
</li>
<li>Wasson-ECE Auxiliary Oven which provides a second thermal zone
</li>
<li>Customized reports including calculations for mole %, weight %, or volume %, and calorific value available
</li>
<li>Optional liquid sampling valves or On-board Vaporizer expands the analytical capabilities to liquefied gases
</li>
<li>Optional fourth detector available on all Super RGA configurations
</li>
</ul>
<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Altium_International_Wasson_RGA_GC_analyzator_rafinerskych_plynu_Wasson_ECE_Moznosti_konfigurace_RGA_17545e3d4c.jpg" alt="Wasson: Wasson-ECE RGA Configuration Options"/>
<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Altium_International_Wasson_RGA_GC_analyzator_rafinerskych_plynu_Ukazkovy_chromatogram_standardni_RGA_1b72a88528.jpg" alt="Wasson: 383-Standard Refinery Gas Analysis"/>
<h3>Wasson-ECE Super RGA</h3>
Wasson-ECE has the unique ability to add a fourth detector to the GC, building our Super RGA series of analyzers. The additional detector expands the analytical capabilities of the standard RGA to accommodate applications such as sulfurs, oxygenates, heavy hydrocarbons, and trace CO/CO₂. This increased flexibility in configurations can reduce the number of GC’s used in a lab, saving clients valuable bench space and time.
<h5>Performance Guarantee</h5>
From hardware to analysis we stand behind our quoted application. Prior to shipping the instrument, chromatograms are submitted for customer approval. Performance is guaranteed to the clients actual sample, not just a generic standard. Any problems with the application during the first year are covered under warranty for an unparalleled performance guarantee.
<h3>The Wasson-ECE Turn-key Process</h3>
<h5>Sales</h5>
<ul>
<li>Application designed to customer&#39;s requirements</li>
</ul>
<h5>Factory Application</h5>
<ul>
<li>Method development and application setup</li>
<li>Customer samples are run to verify performance</li>
<li>Chromatograms are sent for client approval</li>
<li>Factory acceptance training if desired</li>
</ul>
<h5>Installation</h5>
<ul>
<li>Experienced Wasson Field Service Technician</li>
<li>Analysis of client’s real world samples</li>
<li>Calibration and familiarization</li>
</ul>
<h5>Customer Satisfaction</h5>
<ul>
<li>Follow up after installation</li>
<li>Knowledgeable and responsive service team</li>
<li>Optional preventative maintenance visits or service contracts</li>
</ul>
<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Altium_International_Wasson_RGA_GC_analyzator_rafinerskych_plynu_Ukazkove_chromatogramy_Super_RGA_c62a4d715e.jpg" alt="Wasson: Example chromatograms (Super RGA)"/>

Wasson GC DHA Hydrocarbon Expert software

DHA analysis easy and simple. Efficient analysis is now even more efficient. Hydrocarbon Expert software.

Wasson-ECE Dragon DHA is a fast, easy to use application for the detailed hydrocarbon analysis of petroleum products by high efficiency gas chromatography. Dragon DHA uses a convenient, graphical interface to provide a one-screen display for visually observing the chromatogram and manipulating the data calculations in order to obtain the optimum results for analysis and data presentation.
<h3>Dragon DHA Includes:</h3>
<ul>
<li>Quick database creation.
</li>
<li>Fast peak identification and results processing.
</li>
<li>“Unknown” tab lists unidentified peaks in order of concentration.
</li>
<li>“Unknown indexer” takes the user directly to the unknown peak for identification.
</li>
<li>Unique dashboard feature continuously presents the user with all calculated results and instantly recalculates when changes are made.
</li>
<li>Hydrocarbon group-type filtering.
</li>
<li>Full preview and printing of reports.
</li>
<li>Results are bound with chromatographic data for instant retrieval and archiving. 
</li>
<li>Original files and data are never affected (CFR Part 11/ISO 17025).
</li>
<li>Result files are saved as netCDF (.AIA) format files and can be accessed by any third-party application that supports reading .AIA file format.
</li>
<li>Result files work as fully functional reference databases.
</li>
<li>Full reports are stored with results for easy retrieval without reprocessing.
</li>
</ul>
<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Altium_International_Wasson_Obrazek_1_Diagram_casti_DHA_chromatogramu_s_identifikovanymi_a_neidentifikovanymi_piky_b50386d9b9.jpg" alt="Wasson: Diagram of the part of the DHA chromatogram with identified and unidentified peaks. Hydrocarbon Expert greatly simplifies the identification of components by comparing the measured chromatogram with a reference."/>
<h3>Wasson-ECE Dragon DHA Software</h3>
Wasson-ECE Instrumentation Dragon DHA software uses integrated chromatographic data from commercial GC data systems, i.e. ChromPerfect, EZ Chrome, ChemStation. In fact, any GC data system capable of AIA (ANDI) file output is compatible with Dragon DHA.
<h3>Chemical and Physical Property Calculations</h3>
<ul>
<li>Vapor pressure</li>
<li>Oxygenate content</li>
<li>Relative density</li>
<li>Average molecular weight</li>
<li>Calculated research octane number</li>
<li>% carbon, % hydrogen</li>
<li>Calculated bromine number</li>
<li>Mass% and vol% multi-substituted ring aromatics</li>
<li>Total boiling point distribution</li>
<li>Wt%, vol%, mole% of group types by carbon number</li>
<li>Wt%, vol%, mole% of individual components</li>
</ul>
<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Altium_International_Wasson_Obrazek_5_V_software_lze_porovnavat_neomezeny_pocet_signalu_a_reportu_Srovnani_lze_provest_na_jakekoli_urovni_od_shrnuti_dle_skupin_po_vlastni_vypocty_9c06f36d16.jpg" alt="Wasson: An unlimited number of signals and reports can be compared in the software. Comparisons can be made at any level, from group summaries to custom calculations."/>

Wasson Pressurized Liquid Auto-sampler (LS100B)

Wasson-ECE Liquid Auto-Sampler (LS100B) offers laboratory automation for pressurized liquid samples such as liquefied petroleum gas (LPG) and natural gas liquids (NGL).

Wasson-ECE Liquid Auto-Sampler (LS100B) offers laboratory automation for pressurized liquid samples such as liquefied petroleum gas (LPG) and natural gas liquids (NGL).
The LS100B uses inert gases to maintain pressure so that the sample remains in the liquid state at ambient temperature as it passes to the GC for analysis.
The LS100B accommodates up to nine sample cylinders with 1/4 inch tube, VCO, or quick connect fittings. These fittings hold the sample cylinders vertically, ensuring that samples are drawn from the bottom of the cylinder.
<h4>Pressurized Liquid Auto-sampler Features</h4>
<ul>
<li>Purges automatically with carrier gas between each sample run
</li>
<li>Remote-starts the GC and the data recording software such as ChemStation™
</li>
<li>Adds a date/time stamp to all samples
</li>
<li>Holds up to nine 3.5 inch / 8.9 cm diameter sample cylinders
</li>
<li>Works with standard open or floating-piston sample cylinders
</li>
<li>Pauses automatically when it detects that the GC is not running or not ready
</li>
<li>Can interrupt the scheduled sample sequence to process a priority sample
</li>
</ul>

Wasson Dynamic Blender for GC (DB302)

The Dynamic Blender is a portable gas blending device that dilutes a sample or a certified standard with a matrix gas of choice.

Gas chromatography (GC) analyses often include trace level detection of components requiring samples or standards at low concentrations. Some analytes are expensive or difficult to purchase at low levels due to reactivity, adsorption, or high molecular weight. Analyses may also cover a wide concentration range, requiring multi-point calibration.
The Wasson-ECE Dynamic Blender (DB302) provides a simple solution to these calibration needs. The Dynamic Blender is a portable gas blending device that dilutes a sample or a certified standard with a matrix gas of choice. One certified standard with concentrations at the upper limit of the desired calibration curve can be diluted to a lower level (&gt;2 orders of magnitude lower) to create a full calibration curve.
An inert flow path and heated bridge eliminate adsorption and condensation problems when blending gas standards that include sulfur, nitrogen, and other reactive compounds.
An on-board flow controller allows the diluent gas flow to be controlled digitally and samples are fed directly to a gas chromatograph. The Dynamic Blender eliminates the need to purchase and store multiple gas cylinders and provides an easy, cost-effective solution for gas phase calibration needs.
<h4>Dynamic Blender Features</h4>
<ul>
<li>Approximately 100 pre-programmed pure diluent gases and mixtures and twenty user configurable diluent mixture slots.
</li>
<li>Maximum Diluent Pressure of 100 psi (leak tested to this pressure)
</li>
<li>Maximum Temperature of 150°C (operation verified at this temp.)
</li>
<li>Mass Flow Controller Range of 10 – 500 cc/min
</li>
<li>7 μm in-line gas filters (treated) are also provided
</li>
<li>Specially passivated tubing for trace reactive compounds (sulfurs, oxygenates, etc.)
</li>
</ul>
*This treatment is not suitable for samples with pH &gt; 8.0, so please notify your sales representative if you have high pH samples.

Related content

QuEChERS Combined with Low-Temperature Partitioning and GC–MS as an Analytical Strategy for the Determination of Multiclass Pesticide Residues in Cocoa Beans

Webinars LabRulezGCMS Week 07/2026

Research from IOCB Prague reveals a previously unknown mechanism of genetic transcription