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本文提出了动力学-两次标准加入法双组份同时测定的新方法,讨论了测定的基本原理;用停流 FIA光度法研究了钼(VI)和钨(VI)共同催化的 H_2O_2-I~-动力学反应体系,并建立了钼和钨同时测定的条件.用本法测定了钢样和模拟样品中的钼、钨含量,结果满意.钼和钨的回收率分别为97%～102.6%和98.2%～103%;相对标准偏差分别为2.8%～3.2%和2.1%～3.5%.
In this paper, a new method of simultaneous determination of two components with two standard addition methods is proposed. The basic principle of the determination is discussed. The effects of molybdenum (VI) and tungsten (VI) co-catalyzed H_2O_2-I ~ - kinetic reaction system, and the simultaneous determination of molybdenum and tungsten was established.The contents of molybdenum and tungsten in the steel samples and the simulated samples were determined by this method, and the results were satisfactory.The recoveries of molybdenum and tungsten were 97% ~ 102.6 % And 98.2% ~ 103%, respectively. The relative standard deviations were 2.8% ~ 3.2% and 2.1% ~ 3.5% respectively.