Speciation of selenium (IV) in natural waters by solid phase spectrophotometry

被引：13
|
作者：
Valencia, MC [1 ]
Nicolas, EA [1 ]
Capitán-Vallvey, LF [1 ]
机构：
[1] Univ Granada, Dept Analyt Chem, Fac Sci, E-18071 Granada, Spain
来源：
TALANTA | 1999年 / 49卷 / 04期
关键词：
solid-phase spectrophotometry; selenium (IV) speciation; natural waters;
D O I：
10.1016/S0039-9140(99)00088-0
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A method for the speciation of selenium (IV) based on solid-phase spectrophotometry (SPS), has been developed. In acidic conditions selenium (IV) oxidizes potassium iodide and the I-3(-) forms an ionic association with Rhodamine B (RB) which is fixed on a dextran type lipophilic gel. The gel phase absorbances at 590 and 800 nm are measured directly, and allows for the determination of selenium (IV) in the range of 0.7-18.0 mu g 1(-1), with a relative standard deviation (RSD) of 2.8%. The method has been applied to the determination of Se(IV) in natural waters. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：915 / 921
页数：7
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