Gas chromatography (GC) is a key analytical technique widely used in chemical, pharmaceutical, and food laboratories. Especially in combination with mass spectrometry (GC/MS), it represents an indispensable tool for qualitative and quantitative analysis of trace compounds. One of the limiting factors of this method, however, is the consumption of carrier gas – traditionally helium.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Watrex_Praha_Vic_analyz_mene_Helia_Uspora_helia_v_plynove_chromatografii_Watrex_Helium_Saver_f286a7ffe4.jpg" alt="Watrex: Fig. 1 Watrex Helium Saver™" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Watrex_Praha_Vic_analyz_mene_Helia_Uspora_helia_v_plynove_chromatografii_Watrex_Helium_Saver_f286a7ffe4.jpg 245w," sizes="100vw" width="1600" height="900"><h4>Why Helium?&nbsp;</h4>Helium is preferred in gas chromatography due to its inertness, low density, and excellent separation capabilities, particularly in GC/MS where other gases (e.g., nitrogen) do not achieve the required sensitivity and separation speed. Hydrogen could serve as an alternative, but it comes with safety risks (flammability and explosiveness)&nbsp;and, in some applications, chemical reactivity, which may affect the results.&nbsp;Interestingly, helium, although the second most abundant element in the universe, is rare and non-renewable on Earth. It is produced as a by-product of alpha decay of heavy elements and naturally escapes into space. It is often obtained as a by-product of natural gas extraction. Due to growing demand and limited reserves, prices are steadily increasing&nbsp;– currently, a single cylinder can cost CZK 20,000–80,000, with typical laboratory consumption lasting only 1–2 months.&nbsp;<h4>How Do Laboratories Save Helium?&nbsp;</h4><h5>Switching to Hydrogen as Carrier Gas&nbsp;</h5>Hydrogen (H₂) is used in some laboratories as an alternative to helium due to its availability and lower cost. However, it has several significant drawbacks:&nbsp;<ul><li>Safety risk:&nbsp;Hydrogen is highly flammable and explosive, requiring strict safety measures, leak detectors, and proper ventilation.&nbsp;</li><li>Chemical reactivity:&nbsp;Unlike helium, it is not completely inert. It can react with some analytes or column materials, leading to chromatographic artifacts and distorted results.&nbsp;</li><li>Limited method compatibility:&nbsp;Switching to hydrogen often requires re-validation of methods, changes in separation conditions, and detector adaptation. Not all methods are suitable for this transition, and the process may be time-consuming and costly.&nbsp;</li></ul><h5>Switching to Nitrogen Outside Measurement Periods&nbsp;</h5>Nitrogen (N₂) is a cheap, available, and inert gas that can be used to purge chromatographic systems when no measurements are being performed. This helps conserve helium during instrument downtime. However, this method has several limitations:&nbsp;<ul><li>Manual switching required:&nbsp;Operators must switch gases manually and ensure correct timing. Forgetting to switch may lead to either helium waste or delays in starting analyses.&nbsp;</li><li>Purge time:&nbsp;Before each measurement, the system must be flushed with helium to remove nitrogen and ensure proper chromatographic conditions. This can prolong startup times.&nbsp;</li><li>Limited efficiency:&nbsp;Even with diligent manual switching, some helium is still wasted, especially if the operating mode changes frequently.&nbsp;</li></ul><h4>Watrex Helium Saver™: Automated Helium Savings&nbsp;</h4><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">Watrex Praha has introduced Helium Saver™</a>, an intelligent device that addresses this problem fully automatically.&nbsp;<ul><li>How it works:&nbsp;The device monitors the operating schedule of the chromatograph, automatically switches between helium and nitrogen according to the defined plan, and ensures sufficient helium purging before analysis.&nbsp;</li><li>Helium savings:&nbsp;During idle periods, the instrument runs on nitrogen, reducing helium consumption by significant percentages.&nbsp;</li><li>Easy configuration:&nbsp;The device connects via USB – it appears as a flash drive, and all adjustments can be made using any text editor without the need for special software.&nbsp;</li><li>Universal compatibility:&nbsp;It can be easily integrated into any GC/MS system&nbsp;thanks to its universal interface.&nbsp;</li><li>Safety and simplicity:&nbsp;Both automatic and manual modes are available, eliminating the need for daily manual switching.&nbsp;</li></ul><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Watrex_obr_2_Helium_Saver_e97db01669.jpg" alt="Watrex: Fig. 2 Watrex Helium Saver™" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Watrex_obr_2_Helium_Saver_e97db01669.jpg 245w," sizes="100vw" width="1600" height="900"><h4>Benefits for Laboratories&nbsp;</h4>Implementing Helium Saver™ brings:&nbsp;<ul><li>significant cost savings,&nbsp;</li><li>improved operational safety,&nbsp;</li><li>a more sustainable approach to scarce resources,&nbsp;</li><li>simplified configuration and installation,&nbsp;</li><li>optimized laboratory downtime management.&nbsp;</li></ul><h4>Conclusion&nbsp;</h4>Helium remains an essential carrier gas in gas chromatography, particularly in GC/MS applications. With rising costs and limited availability, efficient helium management is becoming increasingly important. <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">Watrex Helium Saver™</a> offers a practical, flexible, and fully automated solution that allows laboratories to use helium more efficiently, without compromising analytical quality.<blockquote>Contact us for more information or a non-binding quote at watrex@watrex.com.</blockquote>

More Analyses, Less Helium! Helium Savings in Gas Chromatography: Watrex Helium Saver™

<h3>Helium as a Critical Resource in Gas Chromatography</h3>Gas chromatography is among the analytical techniques with the highest helium consumption. In routine laboratory operation, helium is used not only during analytical runs themselves, but also during method development, stabilization modes, standby operation, and instrument maintenance. Taken together, GC and GC–MS systems account for a significant share of total helium consumption in analytical laboratories.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Watrex_GC_green_uvod_9d153f0f42.jpg" alt="Watrex: Helium Saver from Watrex Praha" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Watrex_GC_green_uvod_9d153f0f42.jpg 245w," sizes="100vw" width="1600" height="900">From the perspective of modern green chromatography, this represents a major challenge. Helium is a non-renewable and strategically limited resource, and its waste during non-productive phases of operation is unsustainable in the long term. Contemporary approaches to sustainable chromatography therefore do not aim to replace helium at any cost, but rather focus on optimizing its use deploying helium only where it is analytically truly necessary.<h4>Supply Disruptions and Price Volatility: The Everyday Reality of GC Laboratories</h4>Over recent decades, repeated disruptions in helium supply, significant price fluctuations, and increasing pressure from other industrial sectors—particularly cryogenics, medicine, and the semiconductor industry—have become common. These sectors consume helium in large volumes and often receive priority in distribution.For analytical laboratories, this has several direct consequences:<ul><li>increased operating costs due to rising prices,</li><li>uncertainty in planning routine analyses,</li><li>the need to limit GC system operation during periods of shortage,</li><li>pressure to seek alternative operational strategies.</li></ul>Especially problematic is the fact that a substantial portion of helium consumption in laboratories does not directly contribute to the analytical value of measurements, but merely serves to keep systems in an operational state.<h4>Green Chromatography: Efficient Use Instead of Replacement</h4>While switching to alternative carrier gases (e.g., nitrogen or hydrogen) may be suitable in some applications, it is not always technically or validation-wise feasible—particularly for established GC methods. Green chromatography therefore increasingly relies on the concept of intelligent carrier gas management, which makes it possible to:<ul><li>preserve helium for analytical runs,</li><li>minimize its consumption during non-productive modes,</li><li>eliminate human error associated with manual gas switching.</li></ul>This is precisely where automated technological solutions come into play.<h4>Model Calculation of Helium Savings in a Typical GC Laboratory</h4>To illustrate the potential for savings, consider a model GC laboratory with the following parameters:<ul><li>helium flow rate: 1.5 mL/min</li><li>instrument operation: 24 hours per day</li><li>analytical runs: 8 hours per day</li><li>non-productive modes (standby, waiting, stabilization): 16 hours per day</li></ul>Daily helium consumption without optimization:<ul><li>1.5 mL/min × 60 × 24 = 2.16 L helium/day</li></ul>Of this:<ul><li>analytical runs: 0.72 L/day</li><li>non-productive operation: 1.44 L/day</li></ul>If helium is replaced by nitrogen during non-productive modes via automatic switching:<blockquote>➡ helium savings: approx. 67% of daily consumption</blockquote>At a helium price (including logistics and cylinder rental) of, for example, CZK 400–600 per m³, and with several GC systems in operation, annual savings can reach tens of thousands of Czech crowns per instrument while also improving operational stability during periods of limited helium availability.<h4>Automated Solution: Helium Saver™ in the Context of Green Chromatography</h4><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">Helium Saver™</a> from <a target="_blank" rel="noopener noreferrer" href="https://watrex.com/?utm_source=labrulez&amp;utm_medium=propagace&amp;utm_campaign=labrulez_clanky">Watrex Praha</a> is an intelligent device designed for automatic switching between helium and nitrogen based on predefined operating modes. Helium is used exclusively during analytical runs, while during non-productive phases the system is automatically switched to nitrogen.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Watrex_GC_green_schema_98b674386d.jpg" alt="Watrex: Fig.2: Typical Helium Saver connection" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Watrex_GC_green_schema_98b674386d.jpg 245w," sizes="100vw" width="1600" height="900">Thanks to its modular design (Control Module, Switching Valve, and Manual Switch) and universal interface, <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">Helium Saver™</a> can be integrated into GC systems from various manufacturers without major modifications to the instrumentation.From a green chromatography perspective, this solution represents a practical compromise between sustainability, economic efficiency, and preservation of analytical data quality.<h4>Conclusion</h4>Increasing pressure on helium availability and the sustainability of laboratory operations is forcing analytical laboratories to reconsider traditional models of gas chromatography operation. Intelligent management of helium consumption enables significant reductions in costs and environmental burden without the need to modify validation protocols or analytical methodologies.Automated solutions such as <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">Helium Saver™ </a>demonstrate that the principles of green chromatography can be successfully applied even in routine GC practice.<blockquote>Are you 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">Helium Saver</a>? Feel free to contact us at watrex@watrex.com for more information or a non-binding quote.</blockquote>

Green Chromatography in Practice: How to Reduce Helium Consumption in GC Without Compromising Data Quality

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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.

Green Chromatography in Practice: How to Reduce Helium Consumption in GC Without Compromising Data Quality

More Analyses, Less Helium! Helium Savings in Gas Chromatography: Watrex Helium Saver™

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