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在假 0级反应的前提下 ,提出动力学谱的概念 ,其意义是待测组分 (催化剂或反应物 )能额外产生的产物浓度与待测组分浓度之比随反应时间的变化关系曲线 .基于各组分动力学谱的差异 ,建立了同时测定多组分的多元校正模型 .利用该模型 ,以H2 O2 氧化KI为指示反应 ,对Cr6 + ,Mo6 + 和W6 + 进行了同时测定 .铂电极被用作指示物质I- 3的指示电级 ,装备有AD卡的奔腾电脑被用来同步记录动力学过程 .主成分回归法被用以建模并预报未知混合样品
The concept of kinetic spectrum is proposed on the premise of fake 0 reaction, the meaning of which is the curve of the ratio of product concentration to the concentration of the component to be measured as a function of reaction time of the component (catalyst or reactant) Based on the difference of the kinetic spectra of the components, a multivariate calibration model was established for the simultaneous determination of multicomponent components.Using this model, simultaneous determination of Cr6 +, Mo6 + and W6 + was carried out using H2O2 as the indicator reaction. A platinum electrode was used as an indicative level for indicator I-3 and a Pentium computer equipped with an AD card was used to synchronously record the kinetic process. The principal component regression method was used to model and predict unknown mixed samples