期刊
ANALYTICA CHIMICA ACTA
卷 584, 期 2, 页码 403-409出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2006.11.063
关键词
multivariate curve resolution; cadmium; glutathione-fragment; circular dichroism spectroscopy; voltammetry
Multivariate curve resolution with alternating least squares (MCR-ALS) is applied for the first time to the simultaneous analysis of electrochemical and spectroscopic data. Then, a data analysis is done with augmented matrices constituted by Differential Pulse Polarography and Circular Dichroism data submatrices. The use of proper, and different for each submatrix, constrains in the iterative ALS optimization allows to obtain chemically meaningful results constituted by a common matrix containing the concentration profiles, and two matrices with the pure electrochemical and spectroscopic signals. MCR-ALS is applied to the study of the complexation of Cd by Cys-Gly, a glutathione-fragment of great interest for understanding metal-phytochelatins complexation. (c) 2006 Elsevier B.V. All rights reserved.
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