分析化学2014，Vol.42Issue(3)：459-460,2.DOI:10.3724/SP.J.1096.2014.31156
稀酸温和提取直接进样石墨炉原子吸收法快速测定谷物中铅的含量
Rapid Direct Sampling Detection of Pb in Grain Using Diluted Acid Extraction Coupled with Graphite Furnace Atomic Absorption Spectrophotometry
摘要
Abstract
A mild rapid method for the determination of Pb in grain was established by diluted acid extraction and direct sampling detection with graphite furnace atomic absorption spectrophotometer(GF-AAS). Some factors, such as the grain size, nitric acid concentration, extraction time, solid, liquid proportion, and the instrument conditions were optimized. The results indicated that, at room temperature, the extraction rate of Pb in grain by diluted nitric acid was between 92. 14% and 94. 75%, and the average recoveries of Pb in grain extract reached 91. 65%-94. 58%, the precision of method was less than 5%, and the method detection limits and quantification limits were 0. 64 μg/L and 2. 14 μg/L, respectively, meanwhile, the extraction time was shorten to no more than 30 min. Compared with the results pretreated by microwave digestion and determined by GF-AAS, the detection values obtained by diluted acid extraction had no significance difference (p<0. 1).关键词
Diluted acid mild extraction/Graphite furnace atomic absorption spectrophotometry/grain/LeadKey words
Diluted acid mild extraction/Graphite furnace atomic absorption spectrophotometry/grain/Lead引用本文复制引用
周明慧,王松雪,伍燕湘..稀酸温和提取直接进样石墨炉原子吸收法快速测定谷物中铅的含量[J].分析化学,2014,42(3):459-460,2.基金项目
本文系粮食公益性行业科研专项(No.201313005-2)和中央级公益性科研院所基本业务费课题(No.ZX1301)资助 （No.201313005-2）
