|
CRMs for the speciation analysis of chromium in particulate materials
Chromium is a metallic element that occurs predominantly in its trivalent and hexavalent oxidation state. Cr(III) and Cr(VI) differ in charge and physico-chemical propertiers and consequently in chemical and biochemical reactivity. Cr(III) is known as a trace element essential for proper functioning of lipid, glucose, and protein metabolism in mammals, whereas Cr(VI) is much more a threat to biological systems because of its mutagenic and genotoxic effects.
Since Cr(VI) compounds are mostly highly soluble, mobile, and
bioavailable compared to the sparingly soluble Cr(III) compounds,
speciation analysis of chromium is mandatory for a meaningful risk
assessment.
CRMs play a major role in the development and validation of
methods and for quality control. The following certified reference
materials (CRMs) are available for speciation analysis:
* () =information value only, []= original certification no longer valid
NB:! click on the suppliers name to reach his website, click on the
material name for a link to the report, click on the certified species
for a link to the certificate
 back to the summary table
|
