Measurement and Results - Selenocyante and selenium speciation standards
We are also looking into purchasing some selenium speciation standards from your website. We saw Se+4 and Se+6. However, besides these two standards, we also need SeCN-. Do you have selenocyanate standards in liquid form? Also, can you please let me know the chemical forms of Se+4? Is it SeO3(-2)? And Se+6 is SeO4(-2)? We are using an anion exchange column, we would need to know the compound we will be separating.
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The Se+4 product (CGSE(4)1) is prepared in HNO3, and the form in solution should be as selenous acid (H2SeO3). The Se+6 product (CGSE(6)1) is selenic acid in water, and as such is expected to exist as the selenate ion (SeO42-). As for selenocyanate, we have not offered a reference material for this compound, but could explore offering that as a custom product prepared from potassium selenocyanate if desired. |