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铜是人体所必需的微量元素，对人体及环境中铜的测定具有重要的意义。以催化动力学测定铜的方法有：铜催化过氧化氢—桑色素氧化还原反应体系〔１〕；铜催化过氧化氢氧化偶氮氯膦反应体系〔２〕；铜催化过氧化氢氧化百里酚蓝氧化还原体系等〔３－９〕。作者发现铜可催化过氧化氢氧化变色酸的反应，并建立了相应的分析方法，当过氧化氢的浓度为０．１７６５ｍｏｌ／Ｌ，变色酸的浓度为０．０５ｍｏｌ／Ｌ，在柠檬酸和磷酸氢二钠缓冲体系中，于５０℃的水浴中反应８分钟后，停止反应，于４３０ｎｍ处测定其吸光度值。其表观摩尔吸光系数为５．６×１０７。此法简便、灵敏、干扰少，在对实际样品的分析中，结果令人满意。
Copper is a trace element necessary for the human body and is of great significance to the determination of copper in the human body and the environment. Catalytic kinetic determination of copper are: Copper hydrogen peroxide - Morin redox reaction system [1]; copper-catalyzed hydrogen peroxide oxidation of chlorophosphonazo reaction system [2]; copper-catalyzed hydrogen peroxide oxidation Barry Phenol blue redox system [3-9]. The authors found that copper catalyzed the oxidation of chromotropic acid by hydrogen peroxide and established a corresponding analytical method. When the concentration of hydrogen peroxide was 0.1765mol / L and the concentration of chromic acid was 0.05mol / L, After being reacted in a water bath at 50 ° C for 8 minutes, the reaction was stopped and the absorbance was measured at 430 nm. Its apparent molar absorptivity is 5.6 × 107. This method is simple, sensitive, less interference, in the analysis of the actual samples, the results are satisfactory.