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本文建立了一个流动注射在线萃取-火焰原子吸收测定人发中微量镉和铅的方法.对含Cd和Pb分别为0.02μg/ml和0.20μgml的溶液.其相对标准偏差分别为3.4%和3.8%(n=9),Cd和Pb的灵敏度分别提高21倍和23倍.分析速度达36次/h.Cd和Pb的回收率分别在87.3%—97.0%和91.9%—107.3%之间.文中还详细研究了各种实验参数的选择,测定人发样的结果与文献值相符.
A method for the determination of trace cadmium and lead in human hair by flow injection on-line extraction and flame atomic absorption spectrometry was developed.The relative standard deviations (RSDs) were 0.02 μg / ml and 0.20 μgml for Cd and Pb respectively, with relative standard deviations of 3.4% and 3.8% % (n = 9), the sensitivity of Cd and Pb increased by 21 times and 23 times respectively.The analysis speed reached 36 times / h.The recoveries of Cd and Pb were between 87.3% -97.0% and 91.9% -107.3% respectively. In this paper, the choice of various experimental parameters is also studied in detail, and the result of human hair sample determination is consistent with the literature value.