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Determination of gadolinium in river water by SPE preconcentration and ICP-MS

被引：70
作者：
Hennebrüder, K
Wennrich, R
Mattusch, J
Stärk, HJ
Engewald, W
机构：
[1] UFZ Helmholtz Ctr Environm Res, Dept Analyt Chem, D-04318 Leipzig, Germany
[2] Univ Leipzig, Inst Analyt Chem, D-04103 Leipzig, Germany
来源：
TALANTA | 2004年 / 63卷 / 02期
关键词：
Gd-DTPA; REE; lCP-MS; preconcentration procedures; solid phase extraction; river water;
D O I：
10.1016/j.talanta.2003.10.053
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
An analytical scheme was developed for the determination of Gd-diethylenetriaminepentaacetate (Gd-DTPA), Gd and the other rare earth elements (REE) in river water by inductively coupled plasma (quadrupole) mass spectrometry (ICP-Q-MS). The preconcentration step was essential, since the limits of detection of this multielemental analytical technique are higher than the trace concentrations of the interesting elements in river water. Solid phase extraction (SPE) with different commercially available complexing agents (Chelex 100, Toyopearl and ethylhexylphosphates) was employed for the preconcentration of REE. The investigations revealed that complex stability (varying in dependence of the pH Value) has a strong influence on the degree of the enrichment of Gd-DTPA. Based on acidified water samples (pH < 3) a procedure using ethylhexylphosphates was proposed for the preconcentration of Gd and REE from Surface water samples. For this purpose C-18-cartridges loaded with ethylhexyl phosphates were used, resulting in an enrichment factor of 40. (C) 2003 Elsevier B.V. All rights reserved.
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页码：309 / 316
页数：8
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