Determination of Lead and Cadmium in Rapeseed and Rapeseed Meal with Microwave Digestion by Graphite Furnace Atomic Absorption Spectrometry
HE Xiao-min1,WANG Min2,WANG Xiao-dong1,XUE Ai-fang1,LI Sheng-qing1,CHEN Hao1*
1. College of Sciences, Huazhong Agricultural University, Wuhan 430070, China 2. College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China
Abstract：Comprehensive utilization of rapeseed and rapeseed meal has been increasingly emphasized, and contaminative problems of heavy metal have been attracting great attention, so it is of quite important significance to determine the contents of Pb and Cd. An effective method was developed for the rapid determination of Pb and Cd in rapeseed and rapeseed meal. Digestive dissolvent, time and pressure were discussed for sample preparation by microwave digestion technique, and the optimum condition of determination by GFAAS was studied. The determination limits were 2.172 and 0.243 μg·L-1,and the linear arranges were 0-100 μg·L-1 and 0-8 μg·L-1 for Pb and Cd, respectively. The recoveries were from 80.8% to 110.7%. The RSD of determination was lower than 5.3%. The method offers traits of low detection limit, high sensitivity, speediness and exactness, and was applied to the determination of Pb and Cd in samples with satisfactory results.
贺小敏1,王敏2,王小东1,薛爱芳1,李胜清1,陈浩1* . 微波消解-石墨炉原子吸收光谱法测定菜籽及饼粕中铅和镉[J]. 光谱学与光谱分析, 2007, 27(11): 2353-2356.
HE Xiao-min1,WANG Min2,WANG Xiao-dong1,XUE Ai-fang1,LI Sheng-qing1,CHEN Hao1* . Determination of Lead and Cadmium in Rapeseed and Rapeseed Meal with Microwave Digestion by Graphite Furnace Atomic Absorption Spectrometry. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(11): 2353-2356.
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