Factors affecting the accuracy of multicomponent kinetic-spectrophotometric determinations based on multivariate calibration methods

被引：5

作者：

Cullen, TF ^{[1
]}

Crouch, SR ^{[1
]}

机构：

[1] Michigan State Univ, Dept Chem, E Lansing, MI 48824 USA

来源：

ANALYTICA CHIMICA ACTA | 2000年 / 407卷 / 1-2期

关键词：

multicomponent kinetic-spectrophotometric determination; multivariate technique;

D O I：

10.1016/S0003-2670(99)00836-3

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The influence of experimental variables on the accuracy of multicomponent kinetic-spectrophotometric determinations using multivariate calibration techniques is reported. Kinetic and spectral angles are introduced and shown to be good descriptors of the quantity of analytical information present in kinetic-spectrophotometric data. The components of these descriptor angles are described. The effects of instrumental noise and rate constant fluctuation are contrasted. An equilibrium spectrophotometric determination of gallium(III) and nickel(II) is compared to a kinetic determination and a kinetic-spectrophotometric determination. The effect of changing experimental variables (e.g., pH and wavelength range) is discussed, and conclusions are drawn. (C)2000 Elsevier Science B.V. All rights reserved.

引用

页码：135 / 146

页数：12

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