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《EARTH SCIENCE-JOURNAL OF CHINA UNIVERSITY OF GEOSCIENCES》 2000-05
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DETERMINATION OF TRACE LEAD IN ENVIRONMENTAL SAMPLES BY SLURRY SAMPLING WITH GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROMETRY

Liu Handong 1 Liu Guozhen 2 Huang Bing 2 Tian Yongqiang 2 Tang Zhiyong 2 Jin Zexiang 2 (1.Department of City Building and Environmental Protection, Jianghan University, Wuhan430010, China; 2.Faculty of Material Science and Chemical Engineering  
A method has been developed for the determination of trace lead in the environmental samples by slurry sampling with graphite furnace atomic absorption spectrometry (GFAAS). The effects of particle size, slurry concentration, modifiers and slurry stability agents on the accurate determination are dealt with in this paper. The research shows that the particle size 38 μm, the magnetic agitation with 0.2 g/L Triton-100 as stability agent, and the 3 g/L (NH 4) 2HPO 4 as a modifier are of practical use. The detection limit is 0.10ng/g, and the precision ( RSD, n =10) is 3.31%. The analytical results of the standard reference samples are consistent with the certified values.
【Fund】: 国土资源部“九五”科技项目!(No .95 0 5 60 1-2 )
【CateGory Index】: X830.2
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