<p><strong>Helium is, in the field of gas chromatography (GC) and gas chromatography–mass spectrometry (GC/MS), a practically irreplaceable carrier gas. Its chemical inertness, low viscosity, and favorable diffusion properties enable high separation efficiency and reproducibility of analyses. In recent years, however, helium has become an increasingly scarce and expensive resource—a trend that was significantly accelerated in 2026 by geopolitical developments.</strong></p><h4><strong>Helium as a Limited and Strategic Resource</strong></h4><p>Helium is naturally formed through radioactive decay in the Earth’s crust, and its extraction is closely tied to natural gas production. Unlike other technical gases, it cannot be economically synthesized, and once released into the atmosphere, it is irretrievably lost. Production is also geographically concentrated, with key producers including the United States, Qatar, Algeria, and Russia.</p><p>This combination of limited availability and dependence on energy infrastructure makes helium a commodity highly sensitive to geopolitical fluctuations.&nbsp;</p><h4><strong>The Current Conflict as a Key Accelerator of the Crisis</strong></h4><p>While previous “helium crises” were primarily caused by technical or logistical issues, the current situation is fundamentally shaped by conflict in the Middle East, particularly in connection with Iran. At present, this conflict represents the most significant destabilizing factor in the global helium market.</p><p>A key aspect is the disruption of production and exports from Qatar, which accounts for approximately 30–35% of global helium production. Operational limitations in the Ras Laffan area have led to the loss of a substantial portion of global supply. The situation is further exacerbated by instability in the Strait of Hormuz, which serves as the main export route for Qatari helium.</p><p>As a result, <strong>two critical factors</strong> are occurring simultaneously:</p><ul><li>reduced production</li><li>disrupted logistics flows</li></ul><p>From the perspective of the helium market, this combination is exceptionally severe and leads to an actual shortage of supply—not merely price volatility.</p><h4><strong>Current Price Developments and Outlook</strong></h4><p>The above factors have led to a sharp increase in helium prices across the market:</p><ul><li>spot prices have risen by approximately 80–100% within a few months</li><li>contract prices for the laboratory sector have typically increased by 30–50%</li><li>in some regions, supply limitations and allocation regimes are being introduced</li></ul><p>Historically, helium prices were in the range of hundreds of USD per 1,000 scf. Under continued conflict conditions, the current estimated price range is <strong>1,500–2,000 USD per 1,000 scf</strong>, with potential for further growth. This suggests a shift from cyclical fluctuations to a structurally higher price level.</p><h4><strong>Impacts on GC and GC/MS Laboratories</strong></h4><p>Laboratories using GC and GC/MS are among the most affected segments. In these settings, helium is not merely an operating cost but a key parameter influencing:</p><ul><li>separation efficiency</li><li>detection sensitivity</li><li>method stability and validity</li></ul><p>Alternative gases such as hydrogen or nitrogen represent possible solutions, but they often involve trade-offs in terms of safety or chromatographic performance.</p><p>The current situation therefore leads to <strong>several practical consequences:</strong></p><ul><li>a significant increase in operating costs</li><li>pressure to optimize helium consumption</li><li>risk of limiting analytical operations in case of gas shortages</li></ul><p>As a result, helium consumption is shifting from a matter of economic optimization to one of ensuring operational continuity.</p><h4><strong>Efficient Helium Use as a Key Strategy</strong></h4><p>Given that helium remains difficult to replace in GC/MS applications, laboratories are focusing on using it more efficiently. An important fact is that chromatographs often consume helium even outside active analytical operation, such as during nights or weekends.</p><p><strong>Optimizing operating modes</strong> thus represents a relatively simple but highly effective way to reduce consumption without compromising analytical quality.</p><p>One example of a technological approach to consumption optimization is the <a target="_blank" rel="noopener noreferrer" href="https://watrex.com/obchod/chromatography/dedicated-instruments/helium-saver/?utm_source=labrulez&amp;utm_medium=propagace&amp;utm_campaign=labrulez_clanky"><strong>Helium Saver™</strong></a> system developed by Watrex Praha.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Watrex_Praha_Obr_2_Helium_Saver_od_Watrex_Praha_a_jeho_typicke_zapojeni_ad76532754.jpg" alt="Watrex Praha: Fig. 2: Helium Saver by Watrex Praha and its typical setup." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Watrex_Praha_Obr_2_Helium_Saver_od_Watrex_Praha_a_jeho_typicke_zapojeni_ad76532754.jpg 245w," sizes="100vw" width="1600" height="900"></p><p>This system automatically <strong>switches between helium and nitrogen</strong> based on a <strong>predefined schedule:</strong></p><ul><li>helium is used during analyses</li><li>nitrogen is used outside working hours</li><li>before analyses begin, the chromatograph is automatically purged with helium</li></ul><p>This ensures that analytical conditions remain fully preserved, while significantly reducing helium consumption outside active operation.</p><p>At current prices, the investment in a Helium Saver can be comparable to just a few helium cylinders, while delivering long-term savings. No method changes are required, no compromises in analytical results are necessary, and implementation has an immediate impact on operating costs.</p><p>If helium supply or cost is becoming a problem in your laboratory, it may be time to reconsider how it is used. In the current context, this solution is not merely a costreduction tool but an important element in ensuring stable laboratory operation.</p><h4><strong>Conclusion</strong></h4><p>Due to limited availability and geopolitical factors, helium is becoming a strategic resource whose price and availability are increasingly unpredictable. The current conflict in the Middle East represents the most significant supply disruption in decades and has a direct impact on analytical practice.</p><p>For GC and GC/MS laboratories, this means the need to adapt. In addition to methodological adjustments and potential use of alternative gases, optimizing helium consumption appears to be the most effective approach. <a target="_blank" rel="noopener noreferrer" href="https://watrex.com/obchod/chromatography/dedicated-instruments/helium-saver/?utm_source=labrulez&amp;utm_medium=propagace&amp;utm_campaign=labrulez_clanky"><strong>Helium Saver</strong></a> enables efficient use of helium and thus plays an important role not only economically but also operationally.</p><blockquote><p>Interested in <a target="_blank" rel="noopener noreferrer" href="https://watrex.com/obchod/chromatography/dedicated-instruments/helium-saver/?utm_source=labrulez&amp;utm_medium=propagace&amp;utm_campaign=labrulez_clanky"><strong>Helium Saver</strong></a>? Contact us for more information or a non-binding quotation at <strong>watrex@watrex.com</strong>.</p></blockquote>

The End of Cheap Helium? How Geopolitics Is Transforming GC/GC-MS Laboratories

<p><strong>🎤 Presenter:</strong> Maria Llambrich (Institut d’Investigació Sanitària Pere<br>Virgili)</p><p>💾 <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/paper/32778"><strong>PDF presentation</strong></a></p><h3><strong>Abstract</strong></h3><p><strong>Multidimensional chromatography-mass spectrometry (MS) is a powerful analytical technique that integrates two or more chromatographic separations with MS, offering superior resolution, increased signal-to-noise, and selectivity for complex sample analysis. Despite its potential, its adoption remains limited due to data complexity and processing challenges. Chemometric approaches, particularly multiway models like Parallel Factor Analysis (PARAFAC), have proven effective in addressing these challenges by enabling the extraction of meaningful chemical information from multidimensional datasets. However, traditional PARAFAC is constrained by its assumption of data tri-linearity, which may not be valid in all cases, where data have misalignments. To overcome these limitations, we present GcDUO, an open-source data processing software that enables annotation, deconvolution, and analysis of batch GC×GC-MS data (Llambrich et al., Briefings in Bioinformatics 2025, doi: 10.1093/bib/bbaf080, https://github.com/mariallr/GcDuo).&nbsp;</strong></p><p>GcDUO, implemented in R, accepts non-vendor-specific standardized CDF files, and rearranges the data into four-dimensional tensor structures, preserving the GC×GC-MS data structure. GcDUO integrates advanced chemometric methods, including PARAFAC and PARAFAC2, for a more accurate and comprehensive analysis. PARAFAC is particularly useful for deconvoluting overlapping peaks and extracting pure chemical signals, while PARAFAC2 relaxes the tri-linearity constraint, allowing batch analysis for samples. GcDUO achieves both high-resolution peak detection and robust quantification across complex GC×GC-MS datasets. The software was validated against the gold-standard software for comprehensive GC, demonstrating a high correlation (R² = 0.9) in peak area measurements, confirming its effectiveness and reliability. GcDUO provides a valuable, open-source platform in the comprehensive chromatography field, enabling more accessible and customizable data analysis.</p><h3><strong>Video Transcription</strong></h3><p>Gas chromatography coupled with comprehensive two-dimensional separation (GC×GC), especially when combined with high-resolution mass spectrometry (HRMS), has become a widely used technique for the analysis of highly complex samples. It provides enhanced chromatographic resolution, increased peak capacity, and improved sensitivity, enabling more reliable detection and compound annotation.</p><p>These advantages have driven adoption across multiple application areas, including:</p><ul><li>forensic chemistry</li><li>environmental analysis</li><li>petrochemical and fuel characterization</li><li>food, flavors, and fragrances</li><li>biological applications such as metabolomics and breath analysis</li></ul><p>Despite these benefits, increasing instrumental performance also leads to significantly higher data complexity.</p><h4><span><strong>Data Complexity in GC×GC–MS</strong></span></h4><p>A single GC×GC–MS experiment produces <strong>third-order data</strong> consisting of:</p><ul><li>first-dimension retention time</li><li>second-dimension retention time</li><li>mass spectral data</li></ul><p>When multiple samples are analyzed, the dataset becomes <strong>four-dimensional</strong>, forming a complex tensor structure.</p><p>While this enables advanced chemometric analysis, it also creates a barrier for users, as:</p><ul><li>data processing requires specialized workflows</li><li>interpretation demands chemometric expertise</li><li>commercial software often lacks flexibility and automation</li></ul><h4><span><strong>GC Duo: Open-Source Data Processing Tool</strong></span></h4><p>To address these challenges, an open-source software tool called <strong>GC Duo</strong> was developed.</p><h5><span><strong>Key characteristics</strong></span></h5><ul><li>Implemented in <strong>R</strong></li><li>Available on <strong>GitHub</strong></li><li>Designed for <strong>untargeted and batch analysis</strong></li><li>Processes raw GC×GC–MS data without prior knowledge of samples</li></ul><h5><span><strong>Core functionalities</strong></span></h5><ul><li>feature detection</li><li>deconvolution</li><li>spectral identification</li><li>batch processing</li></ul><h4><span><strong>Data Processing Workflow</strong></span></h4><h5><span><strong>1. Data Import and Structuring</strong></span></h5><ul><li>Reads standard <strong>CDF files</strong> (vendor-independent format)</li><li>Converts raw data into <strong>4D tensor structures</strong> using modulation parameters</li></ul><h5><span><strong>2. Region of Interest (ROI) Selection</strong></span></h5><ul><li>Uses an <strong>inverse watershed algorithm</strong></li><li>Identifies significant signal regions based on:<ul><li>peak shape</li><li>signal-to-noise ratio</li></ul></li></ul><h5><span><strong>3. Feature Extraction via PARAFAC</strong></span></h5><ul><li>Applies <strong>Parallel Factor Analysis (PARAFAC)</strong></li><li>Decomposes data into:<ul><li>chromatographic profiles (1st and 2nd dimension)</li><li>corresponding mass spectra</li></ul></li><li>Iterative modeling determines the optimal number of components</li></ul><h5><span><strong>4. Feature Consolidation</strong></span></h5><ul><li>Removes duplicates across samples</li><li>Generates <strong>consensus spectra</strong></li><li>Matches spectra against libraries using similarity scoring</li><li>Optional use of <strong>retention indices</strong></li></ul><h5><span><strong>5. Refinement Step (Key Innovation)</strong></span></h5><ul><li>Re-applies the model using:<ul><li>all samples simultaneously</li><li>defined retention windows</li><li>predefined number of components</li></ul></li><li>Uses <strong>PARAFAC2</strong> for batch data to handle deviations from trilinearity</li></ul><h5><span><strong>Outcome</strong></span></h5><ul><li>improved spectral quality</li><li>detection of low-intensity or unresolved peaks</li><li>more accurate peak area calculation</li></ul><h4><span><strong>Results and Validation</strong></span></h4><h5><span><strong>Training Dataset</strong></span></h5><ul><li>Mixture of <strong>36 compounds</strong> at varying concentrations</li><li>ROI detection successfully identified relevant chromatographic regions</li><li>PARAFAC improved spectral clarity and library matching</li></ul><h5><span><strong>PARAFAC vs. PARAFAC2</strong></span></h5><ul><li>PARAFAC may distort peak alignment → potential quantification errors</li><li>PARAFAC2 preserves original peak shapes → more accurate peak areas</li></ul><h4><span><strong>Validation Datasets</strong></span></h4><h5><span><strong>1. Fruity Beer Dataset</strong></span></h5><ul><li>27 compounds</li><li><strong>85% successfully annotated</strong></li><li>Missing detections due to:<ul><li>absence in library</li><li>low signal intensity</li></ul></li></ul><h5><span><strong>2. Breath Mix Dataset</strong></span></h5><ul><li>12 compounds</li><li><strong>100% identification achieved</strong> (with adjusted S/N threshold)</li><li>Lower thresholds increased noise → trade-off observed</li></ul><h4><span><strong>Performance Comparison</strong></span></h4><ul><li>Compared with vendor software (ChromaTOF)</li><li>Results:<ul><li>consistent retention times</li><li>strong correlation of peak areas (<strong>r ≈ 0.9</strong>)</li></ul></li></ul><h4><span><strong>Additional Observations</strong></span></h4><ul><li>inherent <strong>noise reduction</strong> through PARAFAC</li><li>elimination of additional preprocessing steps</li></ul><h4><span><strong>Conclusions</strong></span></h4><p>GC Duo provides a flexible and comprehensive solution for GC×GC–MS data processing.</p><h4><span><strong>Key advantages</strong></span></h4><ul><li>open-source and customizable</li><li>vendor-independent data handling</li><li>advanced chemometric tools (PARAFAC, PARAFAC2)</li><li>improved reproducibility and interpretability</li></ul><h4><span><strong>Limitations</strong></span></h4><ul><li>high computational demand</li><li>sensitivity to data linearity assumptions</li><li>requires initial data quality assessment</li></ul><h4><span><strong>Final Remarks</strong></span></h4><p>GC Duo represents a powerful platform for untargeted GC×GC–MS studies, enabling advanced data analysis while maintaining flexibility and transparency. Its open-source nature encourages community-driven development and optimization.</p>

GcDUO: A Batch Processing Framework Integrating PARAFAC and PARAFAC2 for GC×GC-MS Data Analysis (Maria Llambrich, MDCW 2026)

<p><strong>Our Library never stops expanding. What are the most recent contributions to LabRulezGCMS Library in the week of 20th April 2026? Check out new documents from the field of the gas phase, especially GC and GC/MS techniques!</strong></p><blockquote><p><span style="font-size:20px;">👉 </span><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library"><span style="font-size:20px;"><strong>SEARCH THE LARGEST REPOSITORY OF DOCUMENTS ABOUT GCMS AND RELATED TECHNIQUES</strong></span></a></p></blockquote><blockquote><p><strong>👉 Need info about different analytical techniques?</strong> Peek into <a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/library"><strong>LabRulezLCMS</strong></a> or <a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/library"><strong>LabRulezICPMS</strong></a> libraries.</p></blockquote><p>This week we bring you application notes by <strong>Agilent Technologies </strong>and<strong> Shimadzu, </strong>brochure by <strong>BaySpec </strong>and<strong> </strong>presentation by <strong>MDCW / William &amp; Mary!</strong></p><h3><strong>1. Agilent Technologies: Analysis of Aromatic Amines in Textile Samples</strong></h3><p><strong>Using hydrogen carrier gas and an Agilent 8890 gas chromatography system coupled with an Agilent 5977C GC/MSD with an Agilent HydroInert source</strong></p><ul><li>Application note</li><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/an_amines_textile_gcms_5994_8997en_agilent_1a9ca88e41.pdf"><strong>Full PDF for download</strong></a></li></ul><p>Azo dyes, characterized by the azo group (–N=N–), represent the largest class of synthetic organic colorants, accounting for approximately 70% of the global dye market with over 3,000 variants in use.<sup>1</sup> Their widespread application in textiles, leather, plastics, cosmetics, food, and pharmaceuticals is attributed to their low cost, colorfastness, and structural versatility. Global textile dye production exceeded 1 million tons in 2020.1 Despite their industrial significance, azo dyes pose serious environmental and health concerns.<sup>1,2 </sup>Up to 15% of these dyes are discharged into wastewater or solid waste streams, and as much as 40% may be lost during textile processing. Resistant to degradation, they persist in ecosystems and can release harmful aromatic amines under certain conditions.<sup>1</sup> Numerous GC/MS-based analytical methods are available for the estimation of amine compounds. These methods use helium as the carrier gas. For a sustainable analytical solution, there is a need for an alternative carrier gas to overcome the challenges occurring due to helium scarcity.&nbsp;</p><p>The method adopted for this application note demonstrates the use of hydrogen as a carrier gas in the Agilent 8890 gas chromatography system coupled with the Agilent 5977C GC/MSD using a HydroInert source for the quantification of aromatic amines residues in textile&nbsp;samples.&nbsp;</p><h4><strong>Experimental</strong></h4><ul><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?mainauthorItems=10&amp;search=8890"><strong>Agilent 8890 Gas Chromatography System</strong></a></li><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?mainauthorItems=10&amp;search=5977C"><strong>Agilent 5977C GC/MSD</strong></a></li></ul><h4><strong>Conclusion&nbsp;</strong></h4><p>This application note presents key strategies for the analysis of amines using GC/MS with hydrogen as the carrier gas, while maintaining sensitivity to meet the maximum residue limits (MRLs) as mentioned in part 1 of ISO:14362. The method includes an Agilent J&amp;W DB-35ms column (20 m × 0.18 mm, 0.18 µm) and a hydrogen‑compatible electron ionization source, the Agilent HydroInert source. The optimized setup with hydrogen showed good chromatographic resolution. The HydroInert source was shown to provide good sensitivity. The method presented here allowed for the quantitation of 24&nbsp;target amines analytes at concentrations ranging from 0.25 to 20 µg/mL in an aqueous standard. Good repeatability was found with %RSD values below 5 for 22 of the 24&nbsp;compounds. Real world textile samples were also analyzed using the same method and three target compounds—aniline, o-toluidine, and benzidine—were observed as present in those samples.</p><h3><strong>2. BaySpec: </strong><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/products/2221"><strong>Ion-K9</strong></a><strong> The World’s First Portable, Non-Contact Trace Vapor Detector</strong></h3><ul><li>Brochure</li><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/AFT_u_MS_flyer_final_e882bcb462.pdf"><strong>Full PDF for download</strong></a></li></ul><p>The <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/products/2221"><strong>Ion-K9</strong></a> represents a breakthrough in trace detection technology as the world’s first portable, non-contact vapor detector. Designed for rapid and reliable field deployment, this system enables real-time identification of trace-level threats without the need for direct sample contact. By utilizing advanced vapor sampling and mass spectrometry, it provides a safe and efficient solution for detecting hazardous substances in security, forensic, and environmental applications .</p><p>At the core of the Ion-K9 is a miniature linear ion trap mass analyzer combined with a non-radioactive ionization source, allowing detection of a wide range of explosives and narcotics. The system achieves ultra-high sensitivity down to parts-per-trillion levels (pptv), ensuring reliable identification of compounds such as TNT, RDX, fentanyl, and methamphetamine. Its ability to operate in both positive and negative ion modes further enhances detection flexibility across diverse chemical classes .</p><p>The instrument is engineered for operational reliability in real-world environments, offering a low false alarm rate below 0.001% while maintaining detection rates above 99.999%. An integrated Intel® Core™ i7 system with a touchscreen interface provides intuitive operation and immediate visual feedback, enabling users to quickly assess whether a threat is present and access detailed analytical data when needed .</p><p>With its compact, portable design and capability for battery operation, the Ion-K9 is well suited for deployment in airports, border control, law enforcement, and emergency response scenarios. By combining high sensitivity, rapid analysis, and non-contact sampling, it delivers a powerful tool for modern security and analytical workflows, ensuring both efficiency and operator safety in demanding environments.</p><h3><strong>3. MDCW / William &amp; Mary: Developing a Combined Approach to Green Gunshot Residue Analysis in the Forensic Laboratory</strong></h3><ul><li>Presentation</li><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/O_24_Saunders_f2c5bcdb20.pdf"><strong>Full PDF for download</strong></a></li></ul><section><div><div><div><div><div><div><p>The growing adoption of environmentally friendly (“green”) ammunition presents new analytical challenges for forensic laboratories, particularly in the detection of gunshot residue (GSR). Traditional approaches rely heavily on identifying inorganic particles containing heavy metals such as lead, barium, and antimony. However, green ammunition eliminates these markers, producing residues composed of more ubiquitous materials that are significantly harder to detect and interpret. This shift necessitates the development of new analytical strategies capable of identifying both inorganic and organic components of GSR.</p><p>To address this challenge, a combined analytical approach integrating scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDS) and comprehensive two-dimensional gas chromatography (GC×GC) was developed. SEM-EDS enables detailed morphological and elemental characterization of particles, identifying features such as size, shape, and elemental composition. In parallel, GC×GC provides enhanced separation and detection of organic gunshot residue (OGSR), offering significantly improved resolution and peak capacity compared to conventional one-dimensional GC methods.</p><p>Method development focused on optimizing GC×GC parameters, including inlet temperature, modulation period, and chromatographic conditions, to improve analyte detectability. As illustrated by chromatographic data, optimized conditions led to better separation and increased visibility of key compounds compared to standard methods. The approach was validated using multiple standards, including phthalates, nitroaromatic compounds, nitroglycerin, and gun surveillance mixtures, demonstrating reliable identification of relevant analytes in complex matrices.</p><p>Overall, this integrated workflow represents a promising strategy for modern GSR analysis, particularly for samples derived from green ammunition. By combining inorganic particle characterization with advanced organic residue analysis, the method enhances analytical confidence and expands the capability of forensic laboratories. Future work will focus on further method refinement, including sorbent-based extraction techniques and the incorporation of retention indices, to strengthen robustness and support admissibility under forensic standards.</p></div></div></div></div></div></div></section><h3><strong>4. Shimadzu: Simple Aroma Component Analysis Using </strong><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library?mainauthorItems=1&amp;search=gc-2060"><strong>Nexis GC-2060</strong></a><strong> with a Multi-Mode Inlet (MMI) Detectors</strong></h3><ul><li>Application note</li><li><a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/labrulez-bucket-strapi-h3hsga3/an_01_01165_en_9af6a30e20.pdf"><strong>Full PDF for download</strong></a></li></ul><h5><strong>User Benefits</strong></h5><ul><li>By installing an MMI in a Nexis GC-2060 system, a wide variety of injection methods can be used .</li><li>By using a MonoTrap silica monolith sorbent to collect aroma components, highly sensitive analysis can be achieved without cumbersome extraction procedures.</li><li>With the MMI thermal desorption/extraction mode, aroma components can be analyzed without dedicated sample-preparation equipment.</li></ul><p>Given that aroma is an important attribute of foods, gas chromatography (GC) and gas chromatography–mass spectrometry (GC-MS) are often used for qualitative and quantitative analysis of aroma components. Aroma components are typically collected from foods using headspace sampling, solid-phase microextraction (SPME), or liquid extraction methods, but for this article, a MonoTrap silica monolith sorbent was used to collect aroma components from alcoholic beverages. With the MonoTrap, aroma components can be collected and concentrated without cumbersome extraction procedures, enabling highly sensitive analysis.&nbsp;</p><p>In this case, aroma components were analyzed using a Nexis GC-2060 gas chromatograph system equipped with a MultiMode Inlet (MMI). The MMI is a newly developed inlet that supports a wide range of injection methods. This article describes using the thermal desorption/extraction mode, one of the methods available with the MMI, to desorb the aroma components collected on the MonoTrap sorbent and inject them into the GC unit. That enabled highly sensitive aroma analysis while reducing analysis costs, without using dedicated sample-preparation equipment.</p><h4><strong>Overview of the Multi-Mode Inlet (MMI)</strong></h4><p>The Nexis GC-2060 can be equipped with a Multi-Mode Inlet (MMI) (Fig. 1 (right)), a new type of inlet . The MMI is a newly developed inlet that allows many injection methods to be used with a single inlet—not only the commonly used split/splitless injection methods, but also programmed temperature vaporizing (PTV) injection, direct injection, large volume injection, and thermal desorption/extraction methods . It supports a wide range of applications across many fields, including analyzing pesticide residues in foods using largevolume injection and aroma analysis using thermal desorption. Because the MMI enables rapid temperature ramping at rates up to 1200 °C/min, it can suppress peak broadening. In addition, by selecting optional cooling with compressed air or liquid nitrogen, analysis cycle times can be shortened with fast cooling. The GC-2060 also comes standard with the “Easy sTop” function, which allows inlet maintenance to be performed immediately with simple steps, enabling smooth maintenance operations, such as insert replacement, even after cooling.</p><h4><strong>Conclusion</strong></h4><p>By analyzing aroma components using the Nexis GC-2060 in combination with a Multi-Mode Inlet (MMI) and a MonoTrap silica monolith sorbent, aroma characteristics of respective alcoholic beverages could be analyzed and evaluated easily without dedicated sample-preparation equipment and without performing cumbersome extraction procedures. Acknowledgements We would like to express our sincere gratitude to President Shiro Yamada and Mr. Dai Takai of Far Yeast Brewing Co., Ltd., and to President Narihiro Suzuki and Mr. Takuma Yamamiya of ISEKADO (Isekadoya Brewery) for their cooperation in conducting these measurements.</p>

News from LabRulezGCMS Library - Week 17, 2026

Article

Product

Application

Video

Presentation

The Multidimensional Chromatography (MDC) Workshop draws experts in this exciting field to share and discuss their research.

The Multidimensional Chromatography Workshop

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

WATREX Prague is the distributor and producer of HPLC techniques in the Czech Republic and Slovakia. Main Chromatografic and Related Techniques Supported: LC, GPC, IC, IEC, Automated SPE, LC Columns and special column packings, LC method development, Software development, Laboratory Robots.

Watrex Praha

Agilent PCB ZERO SENSOR BD, 415-303-HSP (New)

Agilent PCB Zero Sensor Board (415-303-HSP) – OEM replacement board ensuring accurate sensor signal processing and zero-point calibration for reliable analytical performance.

Agilent Patch-Cable Crossover Shielded, 3 m, 5023-0203 (New)

Agilent 3 m Crossover Shielded Patch-Cable (5023-0203) provides secure, interference-free instrument connections with durable shielding.

Agilent Pressure valve tube assembly with heat insulation, 130-9009025 (New)

OEM Agilent insulated pressure valve tube for 7694A, 7694E, and G1883 headspace samplers. Ensures stable temperature, accurate pressure, and reliable sample transfer.

Agilent Valve/actuator location sensor board, 415-301-HSP (New)

Agilent sensor board for 7694A, 7694E, and G1883 headspace samplers. Detects valve actuator position to ensure precise and reliable system operation.

Agilent Z-rod kit for 7673 ALS, 18596-61010 (New)

Agilent Z-Rod kit for 7673A/B ALS systems. Ensures smooth vertical motion and precise vial positioning for reliable automated sample injection.

Agilent Needle Sampling Valve SS, 301-169-HSP (New)

Agilent nickel-coated stainless steel sampling valve line for 7694A/E and G1883 headspace samplers. Ensures reliable, leak-free sample transfer.

Agilent nickel-plated stainless steel line connecting needle and valve in 7694A/E and G1883 headspace samplers. Provides stable, leak-free sample transfer.

Agilent Motor controller #2 circuit board, for G1888A, 3411500112 (New)

Agilent motor controller board for G1888A headspace sampler. Provides precise motion control for reliable automation of vial and valve mechanisms.

Agilent OEM Motor Controller #2 PCB for G1888A headspace sampler. Provides stable, synchronized control of secondary stepper motor functions.

Agilent Relay, Oven Heater, 364150008 (New)

Agilent solid-state relay for oven heater circuits. Provides accurate power switching and stable temperature control in GC or headspace systems.

Marketplace products from category Spare parts - page 6

Related content

News from LabRulezGCMS Library - Week 17, 2026

GcDUO: A Batch Processing Framework Integrating PARAFAC and PARAFAC2 for GC×GC-MS Data Analysis (Maria Llambrich, MDCW 2026)

The End of Cheap Helium? How Geopolitics Is Transforming GC/GC-MS Laboratories