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发现了痕量铋（Ⅲ）在氨性介质中能催化高碘酸钾与靛红之间的褪色反应，研究了反应的最优化条件和动力学参数，建立了测定痕量铋（Ⅲ）的新方法。方法的最低检测限为4．9×10－12gBi（Ⅲ）／mL，检测范围为0．003～0．200μgBi（Ⅲ）／25mL，用于测定人发及其它生物样品中痕量铋（Ⅲ），获得了满意结果。
We found that trace amounts of bismuth (Ⅲ) can catalyze the discoloration reaction between potassium periodate and isatin in ammoniacal media. The optimization conditions and kinetic parameters of the reaction were studied. The determination of trace amounts of bismuth (Ⅲ) new method. The detection limit of this method was 4.9 × 10-12gBi (Ⅲ) / mL, and the detection range was 0.003 ~ 0.200μgBi (Ⅲ) / 25mL. The method was applied to the determination of trace amounts of bismuth in human hair and other biological samples ), Obtained the satisfactory result.