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Using Alternative Carrier Gases for US EPA VOC Drinking Water Methods

Teledyne LABS

Using Alternative Carrier Gases for US EPA VOC Drinking Water Methods

2 Sept 2015

Limited supplies and the rising cost of helium have spurred the need for analytical methods allowing more economical alternatives. With this in mind, new purge and trap VOC methods are being developed and evaluated using nitrogen purge gas, replacing helium. Building upon this new methodology, replacing the helium carrier gas with hydrogen or nitrogen offers the potential for additional cost savings, eliminating the need for helium altogether. This application note demonstrates the use a Teledyne Tekmar Atomx multimatrix autosampler to examine the suitability of alternative carrier gases for the GC/MS system. Comparisons to previous EPA purge and trap methodology using helium and nitrogen will be made. Calibration data and Method Detection Limits (MDLs) will be presented for all compounds using alternative carrier and purge gases per each method.

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Environmental Monitoring and TestingEnvironmental monitoring and testing uses handheld portable analyzers, kits, spectrometers or chromatography systems for air, water, soil, food and other sample testing. Useful features of analyzers such as BOD and COD include portability, easy calibration, automation and sensitivity.  Environmental test kits for pH, water, moisture, etc, should be accurate, sensitive, reliable, fast and easy to use.GC-MS GC-MS (gas chromatography-mass spectrometry) instruments and equipment are used to separate, quantify and identify mixtures of small and volatile compounds, such as polycyclic aromatics, fatty acids and alcohols. Often used in drug detection, forensic investigation and environmental analysis for pesticides and contaminants, GC-MS is a powerful addition to your lab’s analytical capabilities. GC-MS/MS instruments equipped with a qTOF or triple quadrupole analyzers can give greater sensitivity and resolution to your analysis. Find the best GC-MS instruments and equipment in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.Water PurificationThere are a number of water purification methods available to remove contamination from laboratory water. These systems include demineralization, reverse osmosis, filtration and ultrafiltration. A combination of methods is sometimes necessary to achieve purified water suitable for use in experiments.Drinking Water AnalysisAnalytical methods used to test the purity of drinking water include determining the level of contaminants abides to the level set by the Environmental Protection Agency (EPA).Volatile Organic Compounds (VOCs)Volatile organic compounds (VOCs) are chemicals that have a low boiling point. Some VOCs are harmful to human health, whereas others can be used to determine the shelf-life of foods samples. Method DevelopmentMethod development is the process of creating and optimizing experimental techniques and protocols to achieve reliable, reproducible results. This is essential in various fields, including pharmaceuticals, environmental science, and diagnostics. Browse our peer-reviewed product directory to find the best method development solutions, compare products, check reviews, and get pricing directly from manufacturers.Carrier Gas

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Using Alternative Carrier Gases for US EPA VOC Drinking Water Methods