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Simultaneous determination of catalysts based on the differences in the characteristic rate spectra of catalytic kinetics

✍ Scribed by Zhong-liang Zhu; Zhi-cheng Gu; Rong-mei Chen; Chuan-qiang Han; Bing-liang Lu

Publisher: Elsevier Science
Year: 1994
Tongue: English
Weight: 578 KB
Volume: 298
Category: Article
ISSN: 0003-2670
DOI: 10.1016/0003-2670(94)90039-6

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✦ Synopsis

When a catalyst catalyses an indicator reaction, the reaction rate is a certain function of the concentration of each reactant and product. The plot of rate against the concentration of a reactant or product is called the characteristic rate spectrum (CR!3 when the concentration of the catalyst is fixed. The CRS data are obtained from time-dependent concentrations of the reactant or the product by using the method of Savitzky and Golay and the method of linear interpolation. Based on the difference in CRS, a method for the simultaneous determination of catalysts in a single kinetic run is proposed. The concentration of each catalyst is calculated by principal component regression. As an example, Ru and OS were determined based on their catalytic effects on the indicator reaction between Ce(IV) and A.4111). Factors that affect the accuracy and precision were studied by using the method of cross-validation.

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