COMPUTER METHOD FOR THE SIMULTANEOUS KINETIC DETERMINATION OF COMPOUNDS IN MIXTURES BASED ON THE USE OF DIODE-ARRAY SPECTROPHOTOMETRY

被引：25

作者：

CLADERA, A

GOMEZ, E

ESTELA, JM

CERDA, V

CERDA, JL

机构：

[1] UNIV ILLES BALEARS,DEPT QUIM,E-07071 PALMA DE MALLORCA,SPAIN

[2] UNIV BARCELONA,DEPT MATEMAT APLICADA & ANAL,E-08071 BARCELONA,SPAIN

来源：

ANALYTICA CHIMICA ACTA | 1993年 / 272卷 / 02期

关键词：

KINETIC METHODS; UV VISIBLE SPECTROPHOTOMETRY; COBALT; COMPUTER FITTING; NICKEL;

D O I：

10.1016/0003-2670(93)80586-A

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A computer method for the treatment of kinetic data provided by a diode-array spectrophotometer was developed. The method relies on a non-linear regression procedure for estimating the rate constants and concentrations of mixture components. The underlying principle of this method is fitting the absorption matrix obtained as a function of time and wavelength to a theoretical kinetic equation. This allows the resolution of mixtures of compounds with similar rate constants in a simultaneous fashion provided that they or their reaction products feature appreciable spectral differences from one another. The proposed method was applied to the resolution of Co(II) (0.1-1.0 mug ml-1)-Ni(II) (0.5-5.0 mug ml-1) mixtures based on displacement from their the EGTA complexes by 4-(2'-pyridylazo)resorcinol.

引用

页码：339 / 344

页数：6

共 15 条

[1] DETERMINATION OF IRON BY FLOW-INJECTION BASED ON THE CATALYTIC EFFECT OF THE IRON(III) ETHYLENEDIAMINETETRAACETIC ACID COMPLEX ON THE OXIDATION OF HYDROXYLAMINE BY DISSOLVED-OXYGEN [J].