微波消解-冷原子吸收分光光度法测定甘草中汞的含量

Determination of mercury in Glycyrrhiza by microwave digestion-cold atomic absorption spectrometry

目的建立甘草中汞含量的测定方法。方法采用微波消解。冷原子吸收分光光度法测定甘草中汞的含量。结果汞元素在0—1．8μg范围内其吸光度与浓度呈良好的线性关系（r=O．9987），平均回收率为91．2％，ltSD=1．51％。结论本方法测定甘草中汞的含量，方法简便、快速，检测结果准确度、精密度好，能满足甘草中汞含量的测定要求，可用于实际样品的测定。

OBJECTIVE To establish a method to determinate mercury in glycyrrhiza. METHODS Micro- wave digestion-cold atomic absorption spectrometry was used to determinate mercury in glycyrrhiza. RESULTS The calibration curve was linear in the range of 0 ~ 1.81~g, the standard curve correlation coefficient figure was 0. 9987. The average recovery rate was 91.2%, and the relative standard deviations was 1.51%. CONCLUSION The method is simple ,rapid and the test results are accuracy, precision,which can meet the mercury content in gly- cyrrhiza requirements and could be use for determination of practical samples.