期刊
WATER RESEARCH
卷 42, 期 4-5, 页码 1195-1203出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2007.09.002
关键词
simultaneous speciation; selenium and antimony; ETV-ICP-MS; cloud point extraction; water
A new method was developed for the simultaneous speciation of inorganic selenium and antimony in water by electrothermal vaporization inductively coupled plasma mass spectrometry (ETV-ICP-MS) following selective cloud point extraction (CPE). The method is based on the fact that SOV) and Sb(III) could form complexes with diethyldithiocal.-bamate (DDTC) at pH 6.00, and the complexes were quantitatively extracted into the non-ionic surfactant-rich phase of octylphenoxypolyethoxyethanol (Triton X-114), whereas tile Se(VI) and Sb(V) remained as free species in aqueous solutions. Sb(III) and Se(IV) in concentrate were determined by ETV-ICP-MS after proper disposal. The total Se and total Sb were determined by the same protocol after Se(VI) and Sb(V) were reduced by L-cysteine, and Se(VI) and Sb(V) concentrations were obtained by respectively subtracting Se(IV) and Sb(III) from the total Se and the total Sb. Under the optimized conditions, the limits of detection (LODs) were 0.05 mu g L-1 for Se(lV) and 0.03 [mu g L-1 for Sb(III), the relative standard deviations (RSDs) were 3.5% for Se(IV) and 4.2% for Sb(III) (C = 1.00 mu g L-1, n = S). The proposed method was applied to the speciation of inorganic selenium and antimony in different water samples with satisfactory results. (c) 2007 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据