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本文依据诱导反应的基本原理,提出了一种同时测定多元素的方法;以I,~-—淀粉配合物为指示剂,用停留法研究了Ti~(3+)和Sb~(3+)诱导的Cr(Ⅵ)-I~-氧化还原反应的动力学性质,并建立了同时测定微量钛(Ⅲ)和锑(Ⅲ)的动力学—停留光度法.线性范围分别为0~2.8μg/mL Ti(Ⅲ)和0~2.0μg/mL Sb(Ⅲ),检测限为0.016μg/mL Ti(Ⅲ)和0.010μm/mL Sb(Ⅲ).测定了模拟样品中的钛、锑含量,结果满意.
Based on the basic principle of induced reaction, a method for simultaneous determination of multi-elements was proposed. With the aid of I and ~ -Starch complex as indicator, the effect of Ti ~ (3+) and Sb ~ (3+) Kinetics of the Cr (Ⅵ) -I ~ - redox reaction induced by Cr (Ⅵ) -I and the kinetic-residence spectrophotometry of simultaneous determination of trace amounts of titanium (Ⅲ) and antimony The detection limits were 0.016μg / mL Ti (Ⅲ) and 0.010μm / mL Sb (Ⅲ). The contents of titanium and antimony in the simulated samples were measured and the results were obtained satisfaction.