Total chromium in either drinking water or wastewater for regulatory compliance can be measured with inductively coupled plasma optical emission spectrometry (ICP-OES) using EPA method 200.7 or inductively coupled plasma mass spectrometry (ICP-MS) using EPA method 200.8. Only EPA 200.8, not 200.7, is approved for Unregulated Contaminant Monitoring Rule 3 (UCMR 3) for total chromium analysis because the method offers lower detection limit for the occurrence monitoring for the program.
EPA method 200.8 can be used for metals analysis, including total chromium, in drinking water, surface water, groundwater, and wastewater. Sample preparation differs depending on:
If you are measuring the dissolved analytes or the total recoverable analytes If the sample is drinking water with a turbidity of less than 1 NTU If you are measuring other water samplesAcid digestion is only needed for total recoverable element analysis of water samples, with the exception of drinking water samples with turbidity less than 1 NTU. Nevertheless, all the samples need to be preserved in nitric acid to make sure the pH is less than 2 during storage. For total chromium measurement in UCMR3, all the samples are required to be acid digested regardless of water turbidity.
See the regulations on total chromium and hexavalent chromium measurement. We provide analytical solutions for chromium determination using ion chromatography...ICP-MS, total chromium, chromium (VI), hexavalent chromium, trivalent chromium, chromium-3, chromium (III), chromium-6, chromium (VI), chromium speciation, drinking water analysis, chromium legislation, chromium regulations, chromium drinking water, EPA 218.6, EPA 218.7, EPA 200.8, UCMR 3See the regulations on total chromium and hexavalent chromium measurement. We provide analytical solutions for chromium determination using ion chromatography and atomic absorption spectroscopy technologies.Total Chromium & Hexavalent Chromium Measurement
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