Testing of kinetic models: usefulness of the multiresponse approach as applied to chlorophyll degradation in foods

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Abstract

Cascades of reactions, in which several reactants and products take part, frequently occur in foods. This work shows that kinetic modelling of such reactions having parameters in common is much more powerful when using a multiresponse rather than a uniresponse approach (i.e. analysing more than one reactant/product at the same time rather than only one reactant or product). With multiresponse modelling proposed kinetic models can be tested rigorously for their validity (not really possible with the uniresponse approach), and the precision of the parameters estimated is much increased. Multiresponse modelling requires (in most cases) not minimization of least squares but that of the determinant of the so-called dispersion matrix, consisting of sums of cross-products of the responses measured. Kinetic models describing breakdown of chlorophyll in foods were taken from literature and multiresponse modelling was shown to lead to a better insight in, and indeed improvement of such kinetic models.
Original languageEnglish
Pages (from-to)261-269
JournalFood Research International
Volume1999
DOIs
Publication statusPublished - 1999

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