Use este identificador para citar ou linkar para este item: https://locus.ufv.br//handle/123456789/23757
Tipo: Artigo
Título: Is statistical lack of fit a reliable criterion for chemical complexity?
Autor(es): Reis, Cesar
Bruns, Roy E.
Andrade, João Carlos de
Nakai, Debora
Abstract: Complexations of FeIII and CoII ions with thiocyanate in water-acetone-ethanol ternary mixtures are investigated using multivariate statistical techniques. Simplex lattice and hexagonal mixture designs lead to model equations resulting in similar conclusions. The FeII thiocyanate complex exhibits a very simple dependence (quadratic) on the ternary mixture composition. On the other hand this dependence is much more complex for the CoII thiocyanate complex since even a full cubic mixture model shows a significant lack of fit at the 95% confidence level. These results indicate that the different possible symmetries of the CoII complexes are more sensitive to the ternary mixture composition than are the multistep FeIII complex equilibria.
Palavras-chave: Mixture design
Thiocyanate complexes
Statistical modeling
Editor: Chemometrics and Intelligent Laboratory Systems
Tipo de Acesso: Elsevier B. V.
URI: https://doi.org/10.1016/0169-7439(96)00002-0
http://www.locus.ufv.br/handle/123456789/23757
Data do documento: Jun-1996
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