Multivariate curve resolution applied to the simultaneous analysis of electrochemical and spectroscopic data:: Study of the Cd(II)/glutathione-fragment system by voltammetry and circular dichroism spectroscopy

被引：27

作者：

Alberich, Aristides ^{[1
]}

Arino, Cristina ^{[1
]}

Diaz-Cruz, Jose Manuel ^{[1
]}

Esteban, Miquel ^{[1
]}

机构：

[1] Univ Barcelona, Fac Quim, Dept Quim Analit, E-08028 Barcelona, Spain

来源：

ANALYTICA CHIMICA ACTA | 2007年 / 584卷 / 02期

关键词：

multivariate curve resolution; cadmium; glutathione-fragment; circular dichroism spectroscopy; voltammetry;

D O I：

10.1016/j.aca.2006.11.063

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

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.

引用

页码：403 / 409

页数：7

共 31 条

[1] Glutathione and other low molecular weight thiols in marine phytoplankton under metal stress [J].

Ahner, BA ;

Wei, LP ;

Oleson, JR ;

Ogura, N .

MARINE ECOLOGY PROGRESS SERIES, 2002, 232 :93-103

[2] Spectroscopic characterization of metal bound phytochelatin analogue (Glu-Cys)4-Gly [J].

Cheng, YS ;

Yan, YB ;

Liu, JY .

JOURNAL OF INORGANIC BIOCHEMISTRY, 2005, 99 (10) :1952-1962

[3] Phytochelatins and their roles in heavy metal detoxification [J].

Cobbett, CS .

PLANT PHYSIOLOGY, 2000, 123 (03) :825-832

[4] Complexation of heavy metals by phytochelatins:: Voltammetric study of the binding of Cd2+ and Zn2+ ions by the phytochelatin (γ-Glu-Cys)3Gly assisted by multivariate curve resolution [J].

Cruz, BH ;

Díaz-Cruz, JM ;

Ariño, C ;

Esteban, M .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2005, 39 (03) :778-786

[5] Combining hard- and soft-modelling to solve kinetic problems [J].

de Juan, A ;

Maeder, M ;

Martínez, M ;

Tauler, R .

CHEMOMETRICS AND INTELLIGENT LABORATORY SYSTEMS, 2000, 54 (02) :123-141

[6] Application of a novel resolution approach combining soft- and hard-modelling features to investigate temperature-dependent kinetic processes [J].

de Juan, A ;

Maeder, M ;

Martínez, M ;

Tauler, R .

ANALYTICA CHIMICA ACTA, 2001, 442 (02) :337-350

[7] Multivariate curve resolution of cyclic voltammetric data:: Application to the study of the cadmium-binding properties of glutathione [J].

Díaz-Cruz, MS ;

Mendieta, J ;

Tauler, R ;

Esteban, M .

ANALYTICAL CHEMISTRY, 1999, 71 (20) :4629-4636

[8] Correlation of acid-base chemistry of phytochelatin PC2 with its coordination properties towards the toxic metal ion Cd(II) [J].

Dorcák, V ;

Krezel, A .

DALTON TRANSACTIONS, 2003, (11) :2253-2259

[9] Multivariate curve resolution with alternating least squares optimisation:: a soft-modelling approach to metal complexation studies by voltammetric techniques [J].

Esteban, M ;

Ariño, C ;

Díaz-Cruz, JM ;

Díaz-Cruz, MS ;

Tauler, R .

TRAC-TRENDS IN ANALYTICAL CHEMISTRY, 2000, 19 (01) :49-61

[10] Chemometrics for the analysis of voltammetric data [J].

Esteban, M ;

Ariño, C ;

Díaz-Cruz, JM .

TRAC-TRENDS IN ANALYTICAL CHEMISTRY, 2006, 25 (01) :86-92

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