Highly selective determination of trace quantities of mercury in water samples after preconcentration by the cloud-point extraction method

被引：44
作者：
Afkhami, Abbas [1 ]
Madrakian, Tayyebeh [1 ]
Siampour, Hajar [1 ]
机构：
[1] Bu Ali Sina Univ, Fac Sci, Dept Chem, Hamadan, Iran
来源：
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY | 2006年 / 86卷 / 15期
关键词：
mercury determination; cloud-point extraction; spectrophotometry; CVAAS;
D O I：
10.1080/03067310600797531
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A cloud-point extraction method for preconcentration of ultra-trace quantities of mercury ions as a prior step to its determination by spectrophotometry. The method is based on the cloud-point extraction of mercury in iodide media with Triton X-114. The preconcentrated mercury was then determined spectrophotometrically by measuring the absorbance of the surfactant rich phase at 300 nm and also by cold-vapour atomic absorption spectrometry (CVAAS). Linearity was obeyed in the range of 0.40-40.0 ng mL(-1) by CVAAS and in the range of 10.0-400.0 ng mL(-1) by spectrophotometry. The detection limit is 3.0 ng mL(-1) by spectrophotometry and 0.10 ng mL(-1) by CVAAS. The interference effect of several anions and cations was also tested. The method was used to determine mercury in water samples.
引用
收藏
页码：1165 / 1173
页数：9
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