Preconcentration of Total Mercury from River Water by Anion Exchange Mechanism

被引：4

作者：

Daye, Mirna ^{[1
]}

Ouddane, Baghdad ^{[1
]}

Halwani, Jalal ^{[2
]}

Hamze, Mariam ^{[1
]}

机构：

[1] Univ Lille 1, Equipe Chim Analyt & Marine, UMR CNRS Geosyst 8217, F-59655 Villeneuve Dascq, France

[2] Lebanese Univ, Water & Environm Sci Lab LSEE, Beirut, Lebanon

来源：

ANALYTICAL SCIENCES | 2013年 / 29卷 / 10期

关键词：

Solid phase extraction; anion exchange; silica; mercury; ICP-MS; SOLID-PHASE EXTRACTION; ATOMIC-ABSORPTION-SPECTROMETRY; SILICA-GEL; TRACE HG(II); SEPARATION; SAMPLES; SPECIATION; METALS; IONS;

D O I：

10.2116/analsci.29.955

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A simple and cheap analytical technique was developed for the measurement of total mercury in river water samples using inductively coupled plasma-mass spectrometry (ICP-MS). It is based on the direct complexation of mercury ions using iodide and a cationic surfactant in water for its subsequent solid-phase extraction. Mercury ions are retained on the silica phase as ion pairs in the presence of iodide ions and dodecyltrimethylammonium bromide. Parameters having influential influence on the retention of Hg(II) were investigated: sample flowrate, eluent type, sample volume, iodide and surfactant concentrations. The retained mercury ions are stripped off from silica phase using 10 mL of 8 mol L-1 HNO3 and quantified by ICP-MS. An enrichment factor of 50 was achieved with a maximum adsorption capacity of 718 mu g Hg(II) g(-1). The limit of detection of Hg(II) was 8 pg mL(-1). The developed method was applied for the determination of total mercury in river and tap-water samples.

引用

页码：955 / 961

页数：7

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