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- W2022259744 abstract "This paper reports the application of 11 methods for obtaining kinetic constants from a second-order reaction, that between phenylhydrazine and benzophenone. In this type of reaction the number of absorbing species is lower than the number of steps in the reaction minus one, resulting in a rank-deficient response matrix. The methods used include traditional univariate curve fitting, classical least squares using previously recorded pure spectra, alternating least squares methods with both kinetic and non-negativity constraints, and target-testing methods using principal component scores. An additional recently proposed method based on difference spectra is also examined, suitable for any single-step closed reaction. The methods that performed best were difference spectra, kinetically constrained alternating least squares, and target-testing approaches. Limitations of the traditional methods are described. Copyright © 2003 John Wiley & Sons, Ltd." @default.
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- W2022259744 date "2003-01-01" @default.
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- W2022259744 title "Monitoring of a second-order reaction by electronic absorption spectroscopy using combined chemometric and kinetic models" @default.
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- W2022259744 doi "https://doi.org/10.1002/cem.807" @default.
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