光谱学与光谱分析 |
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Determination of 9 Heavy Metal Elements in Sediment by ICP-MS Using Microwave Digestion for Sample Preparation |
LIANG Shu-xuan, WANG Xin, WU Hong, SUN Han-wen* |
College of Chemistry and Environmental Science, Hebei University; Key Laboratory of Analytical Science and Technology of Hebei Province, Baoding 071002, China |
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Abstract A method for determining 9 heavy metal elements in soil and sediment was developed by using microwave digestion-ICP-MS. The mixture of HNO3-H2O2-HF was found to give the best digestion results for soil and sediment of samples. Under the optimized conditions, the samples were analyzed by ICP-MS with the triple internal standard elements Ge, In and Bi. The results showed that all their correlation coefficients were over 0.999. The national standard soil referenee material (ESS-1 GSBZ50011-88) was analyzed by the described method and the results were accorded with the reference values. The measurement precision range was from 0.48% to 5.73% in terms of relative standard deviation.The recoveries and the limits of detection were in the ranges of 98.0% to 100.7% and 0.011 to 0.328 μg·L-1 respectively, and 11 sediment samples were determined by the proposed method. It was indicated that the method was reliable for determining heavy metal elements in soil and sediment samples.
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Received: 2011-05-12
Accepted: 2011-08-28
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Corresponding Authors:
SUN Han-wen
E-mail: hanwen@hbu.edu.cn
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