MULTIVARIATE CURVE RESOLUTION APPLIED TO CONTINUOUS-FLOW SPECTROPHOTOMETRIC TITRATIONS - REACTION BETWEEN AMINO-ACIDS AND 1,2-NAPHTHOQUINONE-4-SULFONIC ACID

被引：45

作者：

SAURINA, J ^{[1
]}

HERNANDEZCASSOU, S ^{[1
]}

TAULER, R ^{[1
]}

机构：

[1] UNIV BARCELONA,DEPT QUIM ANALIT,E-08028 BARCELONA,SPAIN

来源：

ANALYTICAL CHEMISTRY | 1995年 / 67卷 / 20期

关键词：

D O I：

10.1021/ac00116a017

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A continuous-now acid-base titration system has been developed for the study and analytical application of chemical reactions between amino acids and 1,2-naphthoquinone-4-sulfonate. For each titration, a set of spectra are obtained at pH values from 6.5 to 12.5. Multivariate curve resolution is applied to provide an optimal estimation of concentration and spectra profiles of the species formed during the chemical reaction. Resolution of these chemical species is greatly improved when several runs of different spectrophotometric titrations of the same chemical reaction system (multiple correlated data matrices) are analyzed simultaneously, allowing the quantitative determination of the concentration of amino acid that has reacted in each case.

引用

页码：3722 / 3726

页数：5

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