date:Mar 21, 2014
As they state in their conclusion SIDMS [as per EPA Method 6800] facilitates simultaneous accounting of both Cr species concentrations and correction for transformations by enabling isotopic tagging for the oxidation of Cr(III) and the reduction of Cr(VI) during analysis in aqueous samples. [] the combined extraction/SIDMS procedure is capable of correcting for bidirectional species transformations that may occur during analyses of Cr(VI) in solid samples.