Characterization and determination of stability constants of copper(II)-L-histidine complexation system by using multivariate curve resolution method of visible spectra and two hard modeling methods in aqueous solutions

被引：27

作者：

Abbaspour, A ^{[1
]}

Kamyabi, MA ^{[1
]}

机构：

[1] Shiraz Univ, Fac Sci, Dept Chem, Shiraz 71454, Iran

来源：

ANALYTICA CHIMICA ACTA | 2004年 / 512卷 / 02期

关键词：

Multivariate curve resolution; evolving factor analysis; L-histidine; copper;

D O I：

10.1016/j.aca.2004.02.056

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Multivariate curve resolution, alternating least-squares is applied to spectra data obtained in the study of Cu(II) complexation by L-histidine. The combination of several chemometric techniques based on factor analysis (FA), singular value decomposition (SVD), evolving factor analysis (EFA), and multivariate curve resolution with constrained alternating least-squares (ALS) is used to determine the number of species and their distribution diagram. This multivariate analysis data treatment simultaneously reveals the species Cu, CuL, CuLH, CuL2, CuL2H, and CuLOH, through the calculated concentration profiles and allows the assignment of numerically obtained pure individual spectra. Formation constants of these species were calculated by hard-modeling methods applied potentiometric and spectrophotometric measurements. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：257 / 269

页数：13

共 31 条

[1] Acidity constants and thermodynamic parameters of some phenol derivatives in methanol plus water systems using potentiometry and spectrophotometry methods [J].