Speciation of selenium and tellurium in milk by hydride generation atomic fluorescence spectrometry

被引：31

作者：

Cava-Montesinos, P ^{[1
]}

de la Guardia, A ^{[1
]}

Teutsch, C ^{[1
]}

Cervera, ML ^{[1
]}

de la Guardia, M ^{[1
]}

机构：

[1] Univ Valencia, Dept Analyt Chem, E-46100 Valencia, Spain

来源：

JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY | 2004年 / 19卷 / 05期

关键词：

D O I：

10.1039/b310145b

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A simple, fast and highly sensitive method has been developed for the differentiation of Se and Te into their (IV) and (VI) oxidation states in milk samples by HG-AFS. This procedure involves a previous leaching of milk slurries by sonication with aqua regia for 10 min. Se(IV) and Te(IV) were determined by analysis of the samples without a pre-reduction step; being total Se and Te determined after reduction with KBr. The method provides limit of detection values (LOD) of 0.012 and 0.023 ng ml(-1) for Se(IV) and Te(IV) respectively. Average relative standard deviation values of 10.5%, 3.9%, 12% and 12.5% were found for the determination of Se(IV), Se(VI), Te(IV) and Te(VI) in milk samples containing Se from 11.1 to 32.2 ng g(-1) and Te from 1.1 to 10 ng g(-1). Recovery experiments made on actual samples spiked with Se(IV), Se(VI), Te(IV) and Te(VI) evidenced that the sonication with aqua regia does not modify the oxidation state of the elements considered.

引用

页码：696 / 699

页数：4

共 18 条

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