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  • 1 Shizuoka University Radiochemistry Research Laboratory, School of Science 836, Oya 422 Shizuoka (Japan)
  • | 2 Shizuoka University School of Education 836, Oya 422 Shizuoka (Japan)
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The oxidation reaction of antimony(III) with potassium dichromate has been investigated radiometrically. The quantitative oxidation of antimony(III) was found to be not disturbed even in large amounts of tin(IV). On the basis of these results the redox substoichiometric isotope dilution analysis using potassium dichromate as the oxidizing agent was proposed for the determination of antimony in metallic tin. The antimony content of 1.22±0.05 μg in metallic tin (10 mg) was determined without separation of the matrix element.