EU Regulation 396/2005: Pesticide Residue Testing and the Critical Role of QuEChERS Evaporation in Food Safety

Our Library never stops expanding. What are the most recent contributions to LabRulezGCMS Library in the week of 4th May 2026? Check out new documents from the field of the gas phase, especially GC and GC/MS techniques!<blockquote>👉 <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library">SEARCH THE LARGEST REPOSITORY OF DOCUMENTS ABOUT GCMS AND RELATED TECHNIQUES</a></blockquote><blockquote>👉 Need info about different analytical techniques? Peek into <a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/library">LabRulezLCMS</a> or <a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/library">LabRulezICPMS</a> libraries.</blockquote>This week we bring you application note by Shimadzu, presentation by MDCW / JEOL and technical note by Thermo Fisher Scientific!<h3>1. MDCW / JEOL: Flow-Modulated GCxGC-QMS Analysis Without Splitting Off the GC Flow</h3><ul><li>Presentation</li><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/O_16_Jensen_11e29d5022.pdf">Full PDF for download</a></li></ul><section><div><div><div><div><div><div>This presentation by Kirk Jensen (JEOL USA) explores the feasibility of performing flow-modulated comprehensive two-dimensional gas chromatography (GC×GC) coupled with quadrupole mass spectrometry (QMS) without splitting the GC flow, which is traditionally required to protect MS systems from high carrier gas flows. The core concept builds on GC×GC, where compounds are separated using a primary and secondary column connected via a modulator, significantly increasing separation power compared to one-dimensional GC. The presentation contrasts thermal modulation (offering sharper peaks and higher theoretical sensitivity but requiring cryogenic cooling) with flow modulation, which avoids cryogens, handles volatile analytes well, and is more flexible, but typically demands higher gas flows that standard MS systems cannot tolerate .To address this limitation, the study utilizes the <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?manufacturerItems=24&amp;search=JMS-Q1600GC">JEOL JMS-Q1600GC</a> UltraQuad quadrupole GC-MS system, which can accept unusually high carrier gas flows (up to ~20 mL/min), enabling direct coupling with a SepSolve INSIGHT flow modulator without splitting the effluent . The analytical setup includes dual GC columns (e.g., Zebron ZB-5MSplus for the first dimension and BPX50 for the second), high secondary flow rates (~25 mL/min), and electron ionization (EI) MS detection. Additional system components include optional FID detection, bleed line control, and ChromeSpace software for data processing . This configuration allows full analyte transfer into the MS, eliminating the need for flow splitting and potentially improving detection efficiency.Experimental results demonstrate the applicability of this approach to complex mixtures, including a pesticide mixture containing over 200 compounds and real-world samples such as perfumes and fuels. The GC×GC-MS system produced detailed two-dimensional chromatograms with high spectral quality, enabling the correct identification of approximately 120 compounds despite relatively moderate spectral match factors . Comparisons at different flow rates (e.g., 25 vs. 50 mL/min) showed that spectral integrity and compound identification remain robust, indicating that higher flow operation does not significantly compromise MS performance.In conclusion, the work demonstrates that flow-modulated GC×GC-QMS without flow splitting is feasible, provided that the MS system can tolerate high carrier gas flows. While further optimization is needed (e.g., column selection, inlet pressure, and separation conditions), the approach offers a practical alternative to thermal modulation by eliminating cryogens and simplifying operation. Future work will focus on improving sensitivity, optimizing separations, and exploring alternative carrier gases such as hydrogen to reduce costs and expand applicability</div></div></div></div></div></div></section><h3>2. Shimadzu: Detailed Hydrocarbon Analysis by Nexis GC-2030 Using ASTM D6730</h3><ul><li>Application note</li><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/an_01_00863_en_eb633bc741.pdf">Full PDF for download</a></li></ul><h5>User Benefits</h5><ul><li>Detailed compositional analysis of gasoline in accordance with ASTM D6730 is feasible using the Nexis GC-2030.&nbsp;</li><li>By employing PONAsolution, a PONA/DHA analysis software, laborious identification tasks can be reduced, and quantitation calculations and report generation can be performed automatically.</li></ul>ASTM D6730 specifies the analysis of hydrocarbons in gasoline and oxygenates such as ethanol, methyl tert-butyl ether (MTBE), and ethyl tert-butyl ether (ETBE) over a boiling point range up to 225 ̊C. Identification and quantification of individual compounds in gasoline are critically important for refinery process control and product quality assurance. In this application news, we report compositional analysis of gasoline conforming to ASTM D6730 using the <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?mainauthorItems=1&amp;search=Nexis+GC-2030">Nexis GC-2030 gas chromatograph</a>. Gasoline typically comprises over 100 hydrocarbons, making identification tasks highly complex; however, PONAsolution, a PONA/DHA analysissoftware,simplifies this process.<h4>PONAsolution</h4>PONAsolution Ver.6 provides retention index libraries for each relevant standard (ASTM D6730, D6729, D5134, D6733). Identification of n-alkanes automatically corrects the retention times of the remaining several hundred components, thus streamlining the identification process. When only a specific retention region requires adjustment, the two-point identification function is useful (Fig. 1). In the two-point identification procedure, reference and sample chromatograms are compared while assigning corresponding peaks. First, click on an identified component mark in the reference data (Fig. 1, a), then click the matching sample peak (Fig. 1, b). Repeat this for a second pair of peaks. The retention times of components between these two anchor points are then automatically corrected.<h4>Conclusion</h4>Compositional analysis of gasoline in accordance with ASTM D6730 was performed. The combination of SH PONA Tuning Column and SH-1 PONA main column enabled separation of compounds with closely spaced retention times. Moreover, use of PONAsolution software greatly simplifies complex identification tasks.<h3>3. Thermo Fisher Scientific: Fiber optic probes add flexibility to Raman chemical analysis</h3><ul><li>Technical note</li><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/drx3_flex_tech_note_tn54708_bebb56b870.pdf">Full PDF for download</a></li></ul>Fourier Transform Infrared Spectroscopy (FTIR) and Raman Spectroscopy are non-destructive analytical techniques that rely on the interaction of electromagnetic radiation with molecular vibrations to provide information about the chemical composition and structure of a sample. Despite their similarities, there are some distinct differences between the two techniques. In principle, FTIR is based on the absorption of infrared radiation by molecules and measures changes in dipole moment during molecular vibrations. Raman spectroscopy, on the other hand, is based on the inelastic scattering of monochromatic light and measures changes in polarizability during molecular vibrations.&nbsp;When applied to bulk chemical analysis, both FTIR and Raman spectroscopy can be used to analyze solids, liquids, and gases, but the nature of Raman spectroscopy lends some unique sampling advantages. Additionally, Raman often requires little to no sample preparation. Presented herein are application examples that highlight some of the sampling advantages of Raman spectroscopy. All the spectral data in this technical note were collected using a <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/products/2238">Thermo Scientific™ DXR3 Flex Raman Spectrometer</a> equipped with a fiber optic probe. (Fiber optics are readily available for Raman spectroscopy because of the use of visible and NIR light and do not require the exotic materials associated with FTIR fiber optics.) Preliminary tests for all samples were carried out using both 532 nm and 785 nm excitations, and it was determined that the 785 nm laser set gave an overall better balance between fluorescence and Raman scattering efficiency.<h4>Summary&nbsp;</h4>In this technical note, the analyses of a variety of samples by Raman spectroscopy are demonstrated. All samples were analyzed without sample preparation.&nbsp;<ul><li>Precise and localized analysis at the focal point of the Raman-exciting laser allows sampling through glass bottles, blister packaging and plastic containers, which eliminates possible cross contamination and analyst exposure to hazardous materials. The contributions from the packaging and containers depend on the type of container material, the container thickness, and the materials’ chemical compositional complexity, but these contributions can be readily subtracted out when needed.&nbsp;</li><li>Water is a weak Raman scatterer. Raman therefore has reduced water sensitivity, making it a preferred technique for aqueous solution analysis over FTIR. As demonstrated in the analysis of an energy drink, the Raman bands from water can be subtracted from the spectrum of the aqueous solution, leading to the identification of the components of the solution.&nbsp;</li><li>Raman spectroscopy is well suited for the analysis of inorganic materials, especially in identifying the crystal phases and polymorphs, as demonstrated by the analyses of minerals and pigments in a painting.&nbsp;</li><li>Fiber optic probes provide flexibility and ease of maneuverability. This is particularly advantageous when analyzing samples that are difficult to access or manipulate, such as large containers, geological samples and paintings</li></ul>The DXR3 Flex has multiple sampling options available. A properly configured fiber-optic probe is arguably the most versatile accessory for the analysis of bulk solids and liquids. The advantages, both from those inherent to Raman spectroscopy and those resulting from the use of fiber optic probe, provide opportunities for a wide variety of different applications when using the DXR3 Flex Raman Spectrometer.

News from LabRulezGCMS Library - Week 19, 2026

🎤Francis Femi OloyIn this episode of Concentrating on Chromatography, David speaks with Francis Femi Oloy about using chromatography to uncover hidden pollutants in real-world water systems.Femi’s team analyzed polychlorinated biphenyls (PCBs) in six major rivers in southwestern Nigeria — compounds that were banned decades ago but still persist in the environment. Using a workflow that many analytical labs will recognize — liquid–liquid extraction, cleanup, rotary evaporation, nitrogen blowdown, and GC-ECD detection — they quantified 25 PCB congeners at trace levels and linked the results to ecological and human health risk.<h4>In this conversation, we cover:</h4><ul><li>Why legacy pollutants like PCBs still show up today</li><li>Choosing GC-ECD vs LC-MS for halogenated compounds</li><li>Liquid–liquid extraction and matrix cleanup strategies</li><li>Why sample concentration is critical for dilute environmental samples</li><li>How rotovap + nitrogen blowdown work together without losing volatile analytes</li><li>Seasonal trends (why wet season levels were higher)</li><li>Translating concentration data into meaningful risk assessments</li></ul><h3>Video Transcription</h3><section><div><div><div><div><div><div>Persistent organic pollutants such as polychlorinated biphenyls (PCBs) remain a significant environmental concern despite decades of regulatory restrictions. In this interview, Francais Femi Oloy discusses the environmental and analytical challenges associated with monitoring PCB contamination in rivers of southwestern Nigeria, a rapidly industrializing region where urban growth, industrial activity, agriculture, and dense populations intersect with extensive aquatic systems.Oloy explains that his interest in environmental contaminant analysis emerged from observing unexplained health problems and environmental degradation while growing up in Nigeria. This motivated his transition into organic and environmental chemistry, with a focus on identifying pollutants present in drinking water, agricultural soils, and food systems. Southwestern Nigeria, particularly the Lagos region, represents a critical environmental monitoring area due to intense industrial development, shipping activity, and widespread human dependence on rivers for domestic use, agriculture, and fishing.Although PCBs are considered “legacy pollutants” and are no longer intentionally produced, the interview highlights why they continue to persist in aquatic environments. Old electrical transformers and aging industrial equipment still contain PCB residues, while historical contamination stored in river sediments can become remobilized during flooding, dredging, or sediment disturbance. Because PCBs are hydrophobic and resistant to degradation, they preferentially accumulate in sediments and bioaccumulate through aquatic food chains, creating long-term environmental and human exposure risks.A major focus of the discussion centers on the analytical workflow used for PCB determination in environmental water samples. Composite river water samples were collected in amber glass bottles to avoid contamination and photodegradation, preserved with sodium azide to minimize microbial activity, and stored under cooled conditions prior to extraction. The analytical protocol employed liquid–liquid extraction using dichloromethane (DCM) and hexane to recover both polar and nonpolar PCB congeners. Oloy emphasizes that liquid–liquid extraction was selected over solid-phase extraction (SPE) because of concerns about congener retention within sorbent materials and clogging issues associated with large-volume environmental samples.Following extraction, concentration and cleanup represented critical analytical stages due to the trace-level occurrence and volatility of PCBs. Silica and alumina cleanup procedures were used to remove matrix interferences prior to instrumental analysis. The concentration workflow combined rotary evaporation for bulk solvent reduction with nitrogen blowdown for final volume reduction to less than 1 mL, while carefully avoiding excessive temperature or complete dryness to minimize analyte loss. Oloy repeatedly stresses that improper concentration procedures are among the most common causes of analytical failure in PCB analysis.For instrumental determination, the study utilized gas chromatography coupled with electron capture detection (GC-ECD) rather than LC-MS or GC-MS. According to Oloy, GC was preferred because PCBs are sufficiently volatile for gas chromatographic separation, while ECD provided superior sensitivity and selectivity for chlorinated compounds at environmentally relevant concentrations. The interview also discusses analytical validation strategies, including the use of surrogate standards to assess recoveries, which ranged from approximately 85% to 114%, and signal-to-noise-based determination of detection limits.The study further examined seasonal variations in PCB concentrations, revealing higher levels during the wet season. This observation was attributed to rainfall-driven runoff from contaminated infrastructure, sediment resuspension, and lower temperatures that reduce volatilization losses. To communicate toxicological relevance beyond simple concentration reporting, the researchers also calculated toxic equivalency values (TEQs), converting mixtures of PCB congeners into biologically meaningful toxicity estimates comparable to dioxin toxicity metrics.Beyond environmental monitoring, Oloy highlights broader research interests focused on pollutant remediation and sustainable environmental protection. His group is also involved in developing catalytic materials capable of degrading or removing persistent contaminants from environmental systems. Throughout the discussion, he emphasizes that analytical chemistry plays a central role not only in detecting pollutants, but also in enabling prevention, remediation, and long-term environmental management strategies.</div></div></div></div></div></div></section><blockquote>This text has been automatically transcribed from a video presentation using AI technology. It may contain inaccuracies and is not guaranteed to be 100% correct.</blockquote><blockquote><h4>Concentrating on Chromatography Podcast</h4>Dive into the frontiers of chromatography, mass spectrometry, and sample preparation with host David Oliva. Each episode features candid conversations with leading researchers, industry innovators, and passionate scientists who are shaping the future of analytical chemistry. From decoding PFAS detection challenges to exploring the latest in AI-assisted liquid chromatography, this show uncovers practical workflows, sustainability breakthroughs, and the real-world impact of separation science. Whether you’re a chromatographer, lab professional, or researcher you'll discover inspiring content!You can find Concentrating on Chromatography Podcast in podcast apps:<ul><li><a target="_blank" rel="noopener noreferrer" href="https://open.spotify.com/show/1wZg67rCjoGju4yhqxI3tL">Spotify</a></li><li><a target="_blank" rel="noopener noreferrer" href="https://podcasts.apple.com/tz/podcast/concentrating-on-chromatography/id1788429185">Apple podcast</a></li><li><a target="_blank" rel="noopener noreferrer" href="https://podscan.fm/podcasts/concentrating-on-chromatography">podscan</a></li></ul>and on <a target="_blank" rel="noopener noreferrer" href="https://www.youtube.com/@ChromatographyTalk/videos">YouTube channel</a></blockquote>

Tracking Toxic PCBs in River Water using Gas Chromatography–Electron Capture Detection

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Organomation, founded in 1959, designs and manufactures high-quality nitrogen evaporators and extraction systems. Known for innovation and durability, their lab instruments are used globally for efficient sample preparation with strong customer support.

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Wiley SmartSpectra Raman Database Collection

Unlock a broader spectrum of possibilities with Wiley SmartSpectra Databases, enhancing your chemical compound coverage to ensure more accurate and comprehensive unknown identification.

<blockquote>Unlock a broader spectrum of possibilities with Wiley SmartSpectra Databases, enhancing your chemical compound coverage to ensure more accurate and comprehensive unknown identification.More information on the Wiley Science Solutions website: <a target="_blank" rel="noopener noreferrer" href="https://sciencesolutions.wiley.com/solutions/technique/raman/wiley-smartspectra-raman-database-collection/">Wiley SmartSpectra Raman Database Collection</a></blockquote>The Wiley SmartSpectra Raman Database Collection offers access to 33,163 high-quality spectra for identifying unknown compounds and enhancing analytical workflows. Built on Wiley’s trusted databases, it ensures scientifically sound results.<h5>Key Benefits:</h5><ul data-start="276" data-end="738" data-is-only-node="" data-is-last-node=""><li data-start="276" data-end="352">Aids in identifying rare compounds when empirical databases lack matches</li><li data-start="353" data-end="438">Supports functional group classification, excelling with rigid structures</li><li data-start="439" data-end="530">Derived from Wiley’s high-quality empirical datasets, including Sadtler spectra</li><li data-start="531" data-end="599">Covers a wide range of compound classes for diverse applications</li><li data-start="600" data-end="689">Includes metadata (physical properties, chemical structures) for precise searches</li><li data-start="690" data-end="738" data-is-last-node="">Validated by Subject Matter Experts (SMEs)</li></ul><h4>So, just how much can the SmartSpectra database expand your compound coverage?</h4>The SmartSpectra database accelerates spectral identification by expanding chemical compound coverage. As shown, SmartSpectra data (red) extends the chemical space of the empirical dataset (blue), significantly increasing compound coverage.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Wiley_Wiley_Smart_Spectra_Raman_Database_Collection_Wiley_Raman_empirical_data_only_blue_Smart_Spectra_Raman_data_included_red_da42d540b6.jpg" alt="Wiley: Wiley SmartSpectra Raman Database Collection - Wiley Raman empirical data only (blue), SmartSpectra Raman data included (red)."><h4>Applications</h4>Use the SmartSpectra collection with empirical databases for Raman spectroscopy.<h4>Trusted Data</h4>Wiley is a leading source for spectral data. Its Sadtler databases undergo rigorous quality protocols, from data acquisition to database development. All partner data is thoroughly vetted before inclusion.<blockquote>KnowItAll is a trademark of John Wiley &amp; Sons, Inc. in certain jurisdictions.Subscription content is subject to change as data may be added or deleted from collections periodically.</blockquote><h3>Databases Included</h3>Subscription includes access to 11 databases including:<ul><li>Wiley SmartSpectra Raman Database of General Compounds (24,585 spectra)</li><li>Wiley SmartSpectra Raman Database of Biochemicals (59 spectra)</li><li>Wiley SmartSpectra Raman Database of Chemical Standards (6,458 spectra)</li><li>Wiley SmartSpectra Raman Database of Drugs (130 spectra)</li><li>Wiley SmartSpectra Raman Database of Dyes (36 spectra)</li><li>Wiley SmartSpectra Raman Database of Explosives and Hazmat Compounds (51 spectra)</li><li>Wiley SmartSpectra Raman Database of Food Related Compounds (277 spectra)</li><li>Wiley SmartSpectra Raman Database of Hydrocarbons (527 spectra)</li><li>Wiley SmartSpectra Raman Database of Industrial Compounds (439 spectra)</li><li>Wiley SmartSpectra Raman Database of Pollutants (449 spectra)</li><li>Wiley SmartSpectra Raman Database of Monomers (152 spectra)</li></ul><h3>Additional information</h3>This SmartSpectra library contains the following valuable metadata to help you narrow and refine your search results:<ul><li>Chemical Structure</li><li>Chemical Name</li><li>Exact Mass</li><li>Formula</li><li>IUPAC InChI/InChIKey</li><li>Molecular Weight</li><li>Nominal mass</li><li>Spectrum/Structure Validation Score</li></ul><h3>Compatibility</h3><ul><li>Recommended as a supplement to the KnowItAll IR Spectral Library collection of curated empirical data.</li><li>For use with KnowItAll 2024 software.</li><li>KnowItAll software is compatible with most major instrument formats. For full KnowItAll file format compatibility information, please visit <a target="_blank" rel="noopener noreferrer" href="https://sciencesolutions.wiley.com/compatibility/">sciencesolutions.wiley.com/compatibility</a>.</li></ul>

Wiley Registry/NIST Mass Spectral Library 2023

Wiley Registry/NIST 2023 is the largest commercial MS library with 3+ million spectra (EI & MS/MS), ensuring reliable unknown compound identification across various applications.

<h4>Comprehensive Compound Coverage for Confident MS Results</h4>The Wiley Registry/NIST Mass Spectral Library 2023 offers unmatched compound coverage with over 3 million spectra (EI and MS/MS), making it the go-to resource for identifying unknowns in GC-MS and MS-MS workflows.Key benefits of the 2023 release:<ul><li>Broad compound range for targeted and non-targeted analysis</li><li>Expanded global patent coverage (USA, China, Japan, Europe)</li><li>Searchable metadata like structures, physical properties, and DOIs</li><li>Quality-checked data curated by experts</li><li>Segmented libraries for enhanced search performance</li><li>Comes with NIST 2023 Software (MS Search, AMDIS, MS Interpreter)</li><li>Now available via KnowItAll subscription for continuous updates</li></ul>New in 2023:<ul><li>74,000+ new compounds, 91,900+ new spectra</li><li>AI-RI values for EI data and major expansion of MS/MS entries</li><li>Spectra assigned a Quality Index for more precise filtering</li></ul>The Wiley Registry/NIST 2023 is compatible with most MS platforms. Learn more at <a target="_blank" rel="noopener noreferrer" href="https://sciencesolutions.wiley.com/compatibility">sciencesolutions.wiley.com/compatibility</a>.

Wiley Food, Flavors, Fragrances, and Related Compounds: GC-MS Library

Wiley’s new Food, Flavors, Fragrances, and Related Compounds GC-MS Library speeds up your analytical workflow with a targeted collection designed to deliver the compound coverage essential for food testing and product development.

Accelerate food testing &amp; analyses with focused, high-quality spectral data<h4>Quality Data. Results You Can Rely On.</h4>Wiley's Food, Flavors, Fragrances, and Related Compounds GC-MS Library helps speed up food testing and product development with over 13,000 carefully curated GC-MS spectra.Includes essential oils, lipids, VOCs, terpenes, herbicides, insecticides, and more—ideal for food, flavor, fragrance, and cannabis applications.<h5>Key Features</h5><ul><li>Broad compound and application coverage</li><li>Includes databases like Adams’ Essential Oil Components, Mondello Lipids</li><li>Spectra come with structures and physical data when available</li><li>Data reviewed by Wiley experts for quality</li></ul><h4>Applications</h4>Perfect for analytical chemists in:<ul><li>Detection, identification, QC, QA</li><li>Food/product screening and development</li></ul><h5>Industries Served</h5>Agriculture, beverages, cannabis, cosmetics, essential oils, food safety, pet food, pesticides, and more.<h4>Trusted Data from Wiley</h4>Wiley ensures data quality from acquisition to database integration. All partner data is vetted thoroughly.<h5>Databases Included</h5><ul><li>Adams’ Essential Oil Components (GC-MS): 2,205 spectra</li><li>Mass Spectra of Volatiles in Food (CINFR): 1,598 spectra</li><li>Biologically and Environmentally Important Organic Compounds (Isidorov): 1,926 spectra</li><li>Mass Spectra of Pesticides 2009 (Kuhnle): 1,238 spectra</li><li>Lipids Mass Spectral Database (Mondello): 430 spectra</li><li>Mass Spectra of Flavors and Fragrances of Natural and Synthetic Compounds (Mondello): 3,462</li><li>Mass Spectra of Pesticides with Retention Indices (Mondello): 1,300</li><li>Plus 1,500 additional records</li></ul><h5>Additional Information</h5>Each record may include: chemical name, structure, exact mass, formula, RI, SMILES, InChI, synonyms, and more.Compatibility / RequirementsRequires KnowItAll Analytical Edition. Supported formats: <a target="_blank" rel="noopener noreferrer" href="https://sciencesolutions.wiley.com/compatibility/">Wiley Compatibility Info</a>

Wiley Maurer, Meyer, Pfleger, Weber: GC-MS Library of Drugs, Poisons, and Their Metabolites 6th Edition

The updated MMPW spectral database is a key resource for clinical and forensic toxicologists. It provides experimental data and classifies substances by toxicological category to support accurate compound identification.

<h4>The Essential Reference for Clinical and Forensic Toxicologists – Newly Updated!</h4>The newly updated 6th edition of the Maurer Meyer Pfleger Weber (MMPW) GC-MS library remains a trusted tool for identifying drugs, poisons, and their metabolites. Developed by experts in Saarland, the database includes 10,948 mass spectra and GC retention indices covering 175 substance categories, including psychoactive compounds, therapeutic drugs, and over 7,800 metabolites.Each compound is classified by toxicological relevance, and identification methods are now included as a PDF. The spectral data support forensic and clinical toxicologists in confident compound identification and data interpretation.Available in formats compatible with most mass spectrometry systems, the MMPW library is essential for any lab focused on toxicology. The latest update adds 518 datasets and nearly 1,900 structures, including recent designer drugs, cannabinoids, opioids, and stimulants.Wiley ensures data quality through strict validation processes, making MMPW a reliable and widely recognized reference in the field.

Wiley Biologically and Environmentally Important Organic Compounds: GC-MS Library (Isidorov)

Wiley’s new database offers mass spectra for over 1,800 key organic compounds as TMS derivatives, including linear temperature-programmed retention indices ranging from 713 to 4700 units.

<h4>Accelerate Your GC-MS Analysis with Wiley’s New TMS Library</h4>Wiley’s latest spectral library features 1,926 mass spectra of biologically and environmentally important organic compounds as TMS derivatives, with retention indices (713–4700). It includes previously uncharacterized high-boiling compounds like glycosides and lignans, detected in plant tissues.Each record contains rich data fields including CAS number, structural/molecular formulas, synonyms, and more. This resource supports a wide range of applications—from natural products and medicinal chemistry to food, fragrance, and environmental analysis.Developed by Prof. Valery A. Isidorov (Bialystok University of Technology), the database is compatible with major MS formats and available for compound search at <a target="_blank" rel="noopener noreferrer" href="https://spectrabase.com/">compoundsearch.com</a>.

Wiley FAMES: Fatty Acid Methyl Ester Mass Spectral Library

The FAMEs Mass Spectral Database includes 240+ spectra and structures of fatty acid methyl esters, with Linear and Kovats Retention Indices recorded on apolar and polar columns using alkane, FAMEs, and FAEEs mixtures.

<h4>Enhance Food Safety Analysis with the FAMEs Mass Spectral Database</h4>The FAMEs Fatty Acid Methyl Esters Database offers 240+ mass spectra and structures with Linear and Kovats Retention Indices measured on both apolar and polar columns. These retention data significantly improve compound identification and reduce the risk of false matches.Unlike LC-MS/MS, GC-MS with TIC screening allows broad-spectrum detection without loss of information, making it ideal for FAMEs profiling, including target bacteria like Pseudomonas aeruginosa.Each entry includes a mass spectrum, searchable structure, chemical details, and retention indices, all measured under strictly controlled conditions using high-purity samples.Searchable by name, molecular weight, or retention time.Explore compound coverage at <a target="_blank" rel="noopener noreferrer" href="https://spectrabase.com/">compoundsearch.com</a>.

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Tracking Toxic PCBs in River Water using Gas Chromatography–Electron Capture Detection

EU Regulation 396/2005: Pesticide Residue Testing and the Critical Role of QuEChERS Evaporation in Food Safety

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