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采用硝酸-双氧水体系及高压消解法处理样品,建立了氢化物发生-冷原子荧光光谱法测定中药材中的痕量汞的测定方法,研究了仪器工作条件、介质酸及浓度、还原剂硼氢化钾浓度对测量结果的影响并进行了优化,在最佳实验条件下对3种云南产地中药材进行了测试,汞的校准曲线在0—10μg.L-1范围内线性良好,相关系数为0.9999,方法的检出限为2.9ng.L-1,RSD为1.8%,测定的3种中药材中的汞含量为5.62—17.29ng.-g 1,加标回收率为90.3%—105.2%。
The nitric acid-hydrogen peroxide system and high-pressure digestion method were used to treat samples. A method for the determination of trace mercury in Chinese herbal medicines by hydride generation-cold atomic fluorescence spectrometry was established. The working conditions, medium acid and concentration, The effect of potassium concentration on the measurement results was optimized and optimized. Three Chinese herbal medicines from Yunnan origin were tested under the optimal experimental conditions. The calibration curve of mercury was linear in the range of 0-10μg.L-1 with a correlation coefficient of 0.9999 , The detection limit of the method was 2.9ng.L-1, the RSD was 1.8%, the mercury content in three kinds of Chinese herbs was 5.62-17.29ng.-g 1, the recoveries were 90.3% -105.2%.