Sorption and preconcentration of metal ions on silica gel modified with 2,5-dimercapto-1,3,4-thiadiazole

被引：96
|
作者：
Lessi, P
Dias, NL
Moreira, JC
Campos, JTS
机构：
[1] UNESP, DEPT QUIM FIS, BR-15385000 ILHA SOLTEIRA, SP, BRAZIL
[2] UNESP, INST QUIM, BR-14800900 ARARAQUARA, SP, BRAZIL
来源：
ANALYTICA CHIMICA ACTA | 1996年 / 327卷 / 02期
基金：
巴西圣保罗研究基金会;
关键词：
preconcentration; silica gel functionalized; 2,5-dimercapto-1,3,4-thiadiazole; bismuthol I;
D O I：
10.1016/0003-2670(96)00074-8
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Silica gel, chemically modified with 2,5-dimercapto-1,3,4-thiadiazole [=Si(CH2)(3)-NC2HNS3], abbreviated as SiB, was used to adsorb metal ions from ethanol by both batch and column techniques. Elution of Cu(II) was done with a solvent mixture of acetone and hydrochloric acid (9:1 v/v). Zn(II), Cd(II), Ni(II), Pb(II), Co(II) and Fe(III) were eluted with 0.5 mol l(-1) HC1 in ethanol solution. The modified silica was applied in the preconcentration of metal ions from commercial ethanol, normally used as engine fuel. The method is suitable for quantifying these metals at low mu g l(-1) levels.
引用
收藏
页码：183 / 190
页数：8
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