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悬浮体制样石墨炉原子吸收光谱法直接测定板栗中微量铅
引用本文:宋光森.悬浮体制样石墨炉原子吸收光谱法直接测定板栗中微量铅[J].光谱学与光谱分析,2005,25(4):570-572.
作者姓名:宋光森
作者单位:武汉工业学院生物与化学工程系,湖北,武汉,430023
基金项目:科技部农业科技成果转化基金 (2 0 0 2 730 0 80 766)资助项目
摘    要:报道了以磷酸氢二铵为基体改进剂,采用悬浮体制样石墨炉原子吸收光谱法(GFAAS)测定板栗中微量铅的方法。对悬浮体的制备、基体改进剂的选择及用量、灰化温度、原子化温度、常见元素对测定的干扰等进行了研究。在优化实验条件下,本法的检出限为0 .4 7ng·mL-1,相对标准偏差(RSD)为6 . 1% ,加标回收率在90 %~10 6 %之间。

关 键 词:石墨炉原子吸收光谱法  悬浮体制样  微量铅  直接测定  板栗  基体改进剂  相对标准偏差  磷酸氢二铵  原子化温度  加标回收率  灰化温度  实验条件  检出限
文章编号:1000-0593(2005)04-0570-03
修稿时间:2004年6月28日

Direct Determination of Trace Lead in Chestnut by Graphite Furnace Atomic Absorption Spectrometry with Slurry Sampling
SONG Guang-sen.Direct Determination of Trace Lead in Chestnut by Graphite Furnace Atomic Absorption Spectrometry with Slurry Sampling[J].Spectroscopy and Spectral Analysis,2005,25(4):570-572.
Authors:SONG Guang-sen
Institution:Department of Biotechnology and Chemical Engineering, Wuhan Polytechnic University, Wuhan 430023, China.
Abstract:A method for the direct determination of trace lead in chestnut by Graphite Furnace Atomic Absorption Spectrometry (GFAAS) with slurry sampling was developed in the present paper. Ammonium ortho-phosphate was used as a matrix modifier. The effects of slurry preparation, particle size of sample, matrix modifier, ashing temperature, atomization temperature, and common coexisting components on the determination of lead were studied. Under the optimized operating conditions, the detection limit, the relative standard deviation (RSD), and the recoveries of standard addition for this method were 0.47 ng x mL(-1), 6.1% (n = 11) and 90%-106%, respectively.
Keywords:Graphite furnace atomic absorption spectrometry  Ammonium ortho-phosphate  Chestnut  Lead
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