Spectrophotometric determination of selenium with 1-naphthyloamine-7-sulfonic acid

被引：15
作者：
Pyrzynska, K
机构：
[1] Department of Chemistry, University of Warsaw, 02-093 Warsaw
来源：
ANALYTICAL SCIENCES | 1997年 / 13卷 / 04期
关键词：
selenium; 1-naphthyloamine-7-sulfonic acid; spectrophotometry;
D O I：
10.2116/analsci.13.629
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The conditions for a spectrophotometric determination of selenium with 1-naphthyloamine-7-sulfonic acid (Cleve's acid) are presented. Se-IV forms a yellow complex with this ligand in sulfuric acid media with maximum absorbance at 350 nm. The molar absorptivity is 8.9X10(4) l mol(-1) cm(-1). The calibration curve is linear up to 3.0 mu g of selenium with Sandell's sensitivity being 0.0009 mu g cm(-2), i.e., the amount of Se in a column of unit cross-sectinal area which gives the absorbance of 0.001. The interference of various ions was studied. The method was applied for the determination of selenium in a vitamin supplement.
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收藏
页码：629 / 632
页数：4
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