Metrohm has introduced CrVI packages featuring its 900 series ion chromatography systems, with guaranteed methods that exceed proposed US limits and identify levels down to ultra-trace parts per trillion.
From 1 July, the California Department of Public Health will be the first agency to enforce a lower limit of 10 µg/L for hexavalent chromium (CrVI) in drinking water. A national limit review by the US Environmental Protection Agency (USEPA) is expected to follow.
CrVI is a strong oxidising agent and known carcinogen and mutagen that has been proven to aggressively damage DNA. It occurs both naturally and, more frequently, as a result of industrial processes.
The Metrohm 930 Compact IC Flex is a dedicated analyser configured for EPA Method 218.7 and the analysis of CrVI in drinking water, while the 940 Professional IC Vario can be expanded to include EPA 300 (anions), EPA 314 (perchlorate) and ASTM D6919 (cations) in series or parallel.
The USEPA and other global regulatory agencies commonly collaborate with Metrohm technology experts during method development and the company’s instruments are written into a variety of regulatory methods – including the most recent update of EPA Method 218.7.
Method 218.7 provides procedures for the determination of hexavalent chromium as the chromate anion CrO(4)2- in finished drinking water using ion chromatography.
