Kinetic Spectrum Method for Analysis of Simultaneous, First-Order Reactions and Application to Copper(II) Dissociation from Aquatic Macromolecules

Dean L. Olson, Mark S. Shuman

Research output: Contribution to journalArticlepeer-review

Abstract

A nonlinear differential rate method that requires no prior knowledge of rate constants, Initial concentrations, or number of components Is developed to analyze multicomponent, first-order or pseudo-first-order reactions. The method gives a kinetic spectrum with peak maxima corresponding to rate constants and peak areas equal to initial concentrations of components. Complete resolution of two components requires a rate constant ratio greater than about 40. The method was applied to a study of Cu(II) dissociation from estuarine humic material In which a Cu(II)-humic mixture was reacted with a colorimetric reagent and absorbance followed from 50 ms to 1835 s. The kinetic spectrum showed bound Cu(II) distributed In two regions over a wide range of rate constants. About 43% of the total Cu(II) dissociated in times greater than 50 ms corresponding to rate constants ≤40 s−1.

Original languageEnglish (US)
Pages (from-to)1103-1107
Number of pages5
JournalAnalytical Chemistry
Volume55
Issue number7
DOIs
StatePublished - Jun 1983
Externally publishedYes

ASJC Scopus subject areas

  • Analytical Chemistry

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