铬（Ⅵ）在过氧化氢氧化碘离子反应中的动力学行为的研究

Studies on the Kinetic Behaviour of Cr(Ⅵ)in the Reaction Between Hydrogen Peroxide and Iodide

铬（Ⅵ）在过氧化氢氧化碘离子反应中的动力学行为的研究朱仲良，顾志澄，陈荣妹（同济大学化学系，上海，２０００９２）（武进化学工业公司，常州）关键词铬（Ⅵ）－碘离子－过氧化氢体系，动力学分析，反应级数长期以来Ｃｒ（Ⅵ）和Ｍｏ（Ⅵ）一直作为稀硫酸介质中Ｈ２...

The Kinetic behaviour of Cr(Ⅵ)in the reaction between I-and H2O2 in dilute H2SO4 medium was investigated.It is found that Cr(Ⅵ)does not act as a catalyst of reaction between I-and H2O2 but act directly as a oxidizing agent of I-.A method for calculating the reaction order is also proposed.It is unnecessary to know the concentration of reactant when this method is used.A Kinetic method for the simultaneous determination of Cr(Ⅵ)and Mo(Ⅵ)is proposed.The linear ranges of determination are 30～300 ng/mL for Cr(Ⅵ)and 2～20 ng/mL for Mo(Ⅵ),respectively.