SPECTROPHOTOMETRIC DETERMINATION OF MIXTURES OF IRON(III) AND MANGANESE(II) BY COMPLEXATION WITH 3-INDOLYLACETOHYDROXAMIC ACID AND PRINCIPAL COMPONENT REGRESSION MULTIVARIATE CALIBRATION

被引：8

作者：

ARRABAL, MJ ^{[1
]}

GONZALEZ, PV ^{[1
]}

GAMEZ, CC ^{[1
]}

MISIEGO, AS ^{[1
]}

DELAPENA, AM ^{[1
]}

机构：

[1] UNIV EXTREMADURA,DEPT ANALYT CHEM,E-06071 BADAJOZ,SPAIN

来源：

ANALYST | 1994年 / 119卷 / 07期

关键词：

EXTRACTION; SPECTROPHOTOMETRY; PRINCIPAL COMPONENT REGRESSION; IRON(III) AND MANGANESE(II) DETERMINATION; 3-INDOLYLACETOHYDROXAMIC ACID;

D O I：

10.1039/an9941901537

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The use of principal component regression (PCR) for the multicomponent analysis of complex mixtures offers considerable advantages over conventional multiple linear regression in ultraviolet-visible spectrophotometry. PCR provides a sensitive and accurate technique for the analysis of complex mixtures with severely overlapping spectra. A method for the simultaneous determination of Fe3+ and Mn2+ is described based on the measurement of the absorbance of the complexes formed by both ions with 3-indolylacetohydroxamic acid. The complexes were extracted with a solution of methyltrioctylammonium chloride in toluene. The application of the PCR multivariate calibration method allowed the resolution of the overlapping of the spectra of the respective Fe3+ and Mn2+ complexes with the hydroxamic acid derivative. The method was applied satisfactorily to the determination of Fe3+ and Mn2+ in several multivitamin preparations.

引用

页码：1537 / 1540

页数：4

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