Wang Z H, Wang S J, Huang Y L
Beijing University of Chemical Technology, Key Laboratory of Science and Technology of Controllable Chemical Reactions, Ministry of Education, Beijing 100029, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2001 Oct;21(5):664-7.
The effects of various experimental conditions on the determination of mercury by cold vapour atomic absorption spectrometry were investigated. Under the optimum conditions, the detection limit of mercury was 0.5 ng.mL-1, and the sensitivity was 1.1 ng.mL-1. The calibration curve was linear in the range of 0-40 ng.mL-1. The analytical procedure of mercury by pressure dissociation method was established by using HNO3, H2SO4 and H2O2(4 + 1 + 1) as oxidant, SnCl2 as reductant in acid medium. The analysis method was successfully applied to the determination of mercry in certified reference material of hair and traditional Chinese medicines, the relative standard deviations were 3.2%, 1.5% and 0.24% respectively. The recovery of mercury was 94.6%-102%. The results obtained were satisfactory. Air can been used as carrier gas instead of high purity argon.
研究了各种实验条件对冷蒸气原子吸收光谱法测定汞的影响。在最佳条件下，汞的检测限为0.5 ng·mL-1，灵敏度为1.1 ng·mL-1。校准曲线在0 - 40 ng·mL-1范围内呈线性。采用HNO3、H2SO4和H2O2（4 + 1 + 1）作为氧化剂，SnCl2作为还原剂，在酸性介质中建立了压力消解-冷蒸气原子吸收光谱法测定汞的分析方法。该分析方法成功应用于头发和中药材标准物质中汞的测定，相对标准偏差分别为3.2%、1.5%和0.24%。汞的回收率为94.6% - 102%。所得结果令人满意。空气可替代高纯氩作为载气。
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