Determination of soluble Cr(III) and Cr(VI) in alkaline soil extract applying IC-ICP/MS

contributed by Metrohm | 11/14/2016

Soil usually contains small amounts of chromium that stem from weathering rocks or anthropogenic sources. The speciation between trivalent chromium – Cr(III) – and hexavalent chromium – Cr(VI) – is important due to the toxic nature of the latter. Here, the two species are separated as Cr(III)-EDTA complex and chromate on a Metrosep A Supp 4 - 250/4.0 column. For detection, speciated isotope dilution mass spectrometry is applied.

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