王水-过氧化氢热浸提原子荧光光谱法快速测定原生中草药中的汞

Rapid Determination of Mercury in Native Chinese Herbal Medicine by Hydride Generation-Atomic Fluorescence Spectrometry with Aqua Regia-Hydrogen Peroxide Heat Extraction

采用王水-过氧化氢预氧化水浴热浸提处理样品,应用原子荧光光谱法快速检测原生中草药中痕量汞.其方法回收率在98.6%~105.4%之间,相对标准偏差在3.0%~7.4%之间,标准系列质量浓度在0.000~6.000μg/L范围内线性关系良好,相关系数为0.999 9,一元线性回归方程为：IF=301.512C＋1.235,方法检出限达到0.021 6μg/L.试验证实,方法具有简便、快速、灵敏度高、取样量少等优点,为原生中草药中痕量汞的检测提供了有效的分析方法.

A method for the rapid determination of trace mercury in Chinese herbal medicine by hydride generation-atomic fluorescence spectrometry is established. The samples were dissolved by aqua regia-hydrogen peroxide oxidation in a hot water bath,the recoveries were 98. 6% ~ 105. 4%,the relative standard deviations were 3. 0% ~ 7. 4%,when the concentration of standard series in the range of 0. 000 ~ 6. 000 μg / L,the standard curve liner relationship was good,the correlation coefficient was 0. 999 9,the linear regression equation was： IF = 301. 512C＋1. 235,the detection limit of the method was 0. 021 6 μg / L. The method is simple,rapid,highly sensitive with less sample quantity,the method is effective for the analysis of trace amount of mercury in native Chinese herbal medicine.