Abstract
The chemical behaviour of Cr/VI/ at low concentrations /10−6–10−7 mol.1−1/ in several aqueous formic acid solutions was studied using high specific activity51Cr/VI/. A simple and efficient radiochromatographic method using paired cation and anion exchange analyses was used to quantify the51Cr/VI/ remaining in solution after different time periods as well as the several51Cr/III/ species formed. The product distribution of monomeric51Cr/III/ species includes those with 0, +1, +2 and +3 charges. Very little dimeric or higher polymeric species are formed. The rate of reaction of51Cr/VI/ with formic acid depends on the acid concentration, the presence or absence of sodium chloride and wheter, or not, the samples are exposed to light.
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Archundia, C., Collins, C.H. & Collins, K.E. Speciation of the reaction products of51Cr/VI/ with formic acid. Journal of Radioanalytical and Nuclear Chemistry Letters 146, 49–56 (1990). https://doi.org/10.1007/BF02199271
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DOI: https://doi.org/10.1007/BF02199271