MULTICOMPONENT KINETIC DETERMINATION OF LANTHANIDES WITH STOPPED-FLOW, DIODE-ARRAY SPECTROPHOTOMETRY AND THE EXTENDED KALMAN FILTER

被引：32

作者：

QUENCER, BM ^{[1
]}

CROUCH, SR ^{[1
]}

机构：

[1] MICHIGAN STATE UNIV,DEPT CHEM,E LANSING,MI 48824

来源：

ANALYTICAL CHEMISTRY | 1994年 / 66卷 / 04期

关键词：

D O I：

10.1021/ac00076a007

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The application of the extended Kalman filter to multicomponent kinetic data is described. The method is based on obtaining data at multiple wavelengths over time using a linear photodiode array detector. The extended Kalman filter is used to process the data obtained. It is shown that accurate results can be obtained even if the estimated value of the rate constant is not completely accurate or reproducible. No pH, ionic strength, or temperature controls were used in testing the chemical system. A system of three lanthanides reacting with 4-(2-pyridylazo)resorcinol (PAR) was used. Accurate estimates of concentrations were obtained even though the relative rate constants for the reactions of La, Pr, and Nd with PAR were 1:1.7:1.9, and a high degree of spectral overlap is present.

引用

页码：458 / 463

页数：6

共 23 条

[1] AUTOMATED STOPPED-FLOW SPECTROPHOTOMETER WITH DIGITAL SEQUENCING FOR MILLISECOND ANALYSES [J].