Method E 7199
This method provides procedures for the determination of hexavalent chromium in drinking water, groundwater, and industrial wastewater effluents. Samples containing high levels of anionic species such as sulfate and chloride may cause column overload. Samples containing high levels of organics or sulfides cause rapid reduction of soluble Cr(VI) to Cr(III).
An aqueous sample is filtered through a 0.45 um filter and the filtrate is adjusted to a pH of 9-9.5 with a concentrated buffer solution. A measured volume of the sample (50-250 uL) is introduced into the ion chromatograph. A guard column removes organics from the sample before the Cr (VI), as CrO4 2- , is separated on a high capacity anion exchange separator column. Post-column derivatization of the Cr (VI) with diphenylcarbazide is followed by detection of the colored complex at 530 nm.
-SW-846 Online: Test Methods for Evaluating Solid Waste, Physical/Chemical Methods
*Please contact our project management team for more information about reporting limits and other specific project needs.
Request a Quote
If you would like us to provide a quote for laboratory analysis, just provide us with information about how we can help you with your project.