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建立了直接测汞仪测定中药材中总汞含量的方法。样品经干燥粉碎成均匀试样后,不需要前处理直接用测汞仪进行测定。本方法在0.2—500ng范围内线性关系良好,相关系数≥0.9992,方法定量下限为2Lg/kg,在10、200、400Lg/kg 3个添加水平12种中药材加标回收率在70.4%—107.1%之间,相对标准偏差为2.9%—10.5%。与传统方法比较,本方法灵敏度高、简便、快速、准确、环保,适用于中药材中总汞含量的快速检测。
A direct mercury analyzer was established to determine the total mercury in Chinese herbal medicines. After the sample is dried and crushed into a uniform sample, it is determined that the mercury content is not directly measured by the pretreatment. The method has a good linearity in the range of 0.2-500ng with a correlation coefficient of ≥0.9992, with a lower limit of quantification of 2Lg / kg. The recoveries of 12 Chinese herbal medicines at 10,200,400Lg / kg were 70.4% -107.1 %, The relative standard deviation of 2.9% -10.5%. Compared with the traditional method, the method has the advantages of high sensitivity, simple, rapid, accurate and environmental protection and is suitable for the rapid detection of the total mercury content in the traditional Chinese medicine.