为了简化测量植物中汞含量的方法，提高灵敏度及结果的可信度，实验采用微波消解植物样品的办法，使样品经氯化亚锡还原，再用冷原子荧光测定出植物样品中汞的含量。确定了消解样品的方法和微波消解样品的条件，优化了仪器的最佳工作参数。方法检出限0．30×10-9（稀释因子100倍），精密度（n＝12）在2．09％～6．05％，加标回收率94．1％～105．5％，方法经生物国家一级标准物质验证方法准确可靠。%For the purpose of simplifying the determination of Hg in plants and improving sensitivity and reliability of the result, samples were firstly treated through the micro-wave digestion process and then reduced with the SnCl2 . After that, the element Hg in the samples was detected with the cold atomic fluorescence spectroscopy. The best solution for the samples digestion and the optimal work parame-ters of the test instrument were obtained during the experiment. The detection limit is 0.30×10-9(dilution factor 100), RSD (n=12) is between 2.09% and 6.05%, and the recovery for the sample is in the range of 94.1%~105.5%. The method was applied to the determi-nation of Hg in biological national standard reference materials and the results show its accuracy and reliability.
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