Application of multivariate curve resolution to the voltammetric study of the complexation of fulvic acids with cadmium(II) ion

被引：21
作者：
Antunes, MC
Simao, JE
Duarte, AC
Esteban, M
Tauler, R [1 ]
机构：
[1] Univ Tras Os Montes & Alto Douro, Dept Quim, P-500911 Vial Real, Portugal
[2] Univ Aveiro, Dept Quim, P-3810312 Aveiro, Portugal
[3] Univ Barcelona, Fac Quim, Dept Quim Analit, Barcelona 08028, Spain
来源：
ANALYTICA CHIMICA ACTA | 2002年 / 459卷 / 02期
关键词：
fulvic acids; multivariate curve resolution; voltammetry; Cd(II) ion; metal complexation;
D O I：
10.1016/S0003-2670(02)00117-4
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The interaction of fulvic acids with Cd(II) ions has been studied by differential pulse anodic stripping voltammetry (ASV), at pH 7.0 and 0.1 M KNO3 . Voltammetric data obtained during the titration of mixtures of Cd(II) and fulvic acids at different concentrations have been analyzed using multivariate curve resolution (MCR). The application of this method allowed the resolution of the major contributions involved in the titration experiments. Apart from free Cd(II), two more contributions related with the complexation process were detected and resolved, and their corresponding pure voltammograms and concentration profiles were estimated. Simultaneous analysis of independent voltammetric titrations using the proposed MCR methods is shown extremely recommended because it overcame some of the limitations observed in the analysis of individual titrations. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：291 / 304
页数：14
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