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
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.
Key words:Microwave digestion;ICP-MS;Sediment;Heavy metal elements
梁淑轩,王 欣,吴 虹,孙汉文*. 微波消解/ICP-MS测定水系沉积物中的9种重金属元素[J]. 光谱学与光谱分析, 2012, 32(03): 809-812.
LIANG Shu-xuan, WANG Xin, WU Hong, SUN Han-wen* . Determination of 9 Heavy Metal Elements in Sediment by ICP-MS Using Microwave Digestion for Sample Preparation . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2012, 32(03): 809-812.
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