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  • 1 Shizuoka University Radiochemistry Research Laboratory, Faculty of Science 836 Ôya 422 Shizuoka Japan
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A new sub-superequivalence method of radiometric analysis is proposed, which is derived by combining the sub-superequivalence method of isotope dilution analysis with substoichiometric radiometric analysis. This method using redox reaction is applied for the determination of trace amount of antimony and was proved to be an excellent technique. The fundamental problems of this method are discussed analytically.