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epa method 418.1 Applications

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    Analysis of VOC compounds in water by Purge & Trap or dynamic headspace

    Context & Challenges Volatile organic compounds (VOC) can be dissolved in water. Sometimes water is polluted and to study contamination of VOC in finished drinking water, VOC must be measured. Chromatotec® Solutions Chromatotec® has developed a specific system for the measurement of VOC in water: a Purge & Trap system, the airmoPURGE. The analyzer is coupled with a degasing system allowing the extraction of dissolved gases. The complete system is based on: - 502.2 method from US EPA – “Volatile organic compounds in water by purge and trap capillary column gas chromatography with photoionization and electrolytic conductivity detectors in series – Revision 2.1”. - 524.2 method from US EPA – “Measurement of purgeable organic compounds in water by capillary column gas chromatography/mass spectrometry – Revision 4.0”.

    By Chromatotec Group based in Val de Virvée, FRANCE.

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    EDXRF spectrometers for ultra low sulfur

    Compliance with the ASTM method at low concentrations sulfur. Sulfur is a major element of importance because it forms sulfuric acid in the atmosphere when burned and has harmful impact on the human health and on the environment. In the mid-2000`s, the Environmental Protection Agency (EPA) began a program to greatly reduce the amount of Sulfur in petroleum products. The current allowable sulfur limit in vehicle fuel is 15 ppm (parts per million). To reduce the pollution coming from vessels the international maritime Organization (IMO) established new limits on emission of sulfur oxides. In Emission Controlled Areas the sulfur limit will be 0.1 % starting 2015. The continued strategy by EPA and IMO to reduce the amount of sulfur in petroleum products put a great demand on sulfur monitoring in fuel and oil products.

    By Xenemetrix Ltd. based in Migdal Haemek, ISRAEL.

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