Abstract：A method was proposed for the determination of trace lead with flame atomic absorption spectrometry after preconcentration of lead by rapid coprecipitation technique with PAR-Fe(Ⅲ) at pH 6.0. The analytical parameters including pH, amount of iron(Ⅲ), amount of reagent, the standing time of the precipitate, etc., were examined. The detection limits (DL) were found to be 18.7 μg·L-1 for Pb(Ⅱ). In analysis of lake water and the milk tea powder samples, RSD’s and the standard addition recovery of this method were in the ranges of 1.03%～2.24% and 94.2%～98.3% respectively. The effect of matrix can be overcome by the method and the results are satisfyiog. The method shows good application prospect in the determination of trace lead owing to its rapidness and reproducibility.
林建梅，姚俊学*，赵文岩 . 有机共沉淀-火焰原子吸收光谱法测定水样及奶茶粉中的微量铅 [J]. 光谱学与光谱分析, 2013, 33(05): 1357-1359.
LIN Jian-mei, YAO Jun-xue*, ZHAO Wen-yan . Determination of Trace Lead in Water and Milk Tea Powder Samples with Organic Coprecipitation-Flame Atomic Absorption Spectrometric . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2013, 33(05): 1357-1359.
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