快速测定植物提取物中的汞

Rapid determination of mercury in plant extract

中文关键词:  汞  直接测汞  植物提取物

英文关键词:mercury  direct mercury analyzer  plant extract

中文摘要:

      目的 建立快速测定植物提取物汞的分析方法。方法 采用直接测汞技术, 样品无需任何前处理直接测定。优化了仪器条件, 进行了检出限、精密度和准确性等方法学研究。结果 经过与国标GB/T 5009.17-2003的比对和国家标准物质的验证, 其线性范围为0～1000 ng, 最低检出限为0.430 μg/kg。 相对标准偏差(RSD)小于3.5%, 回收率在 93.5%～102.8%。结论 用茶叶、圆白菜和菠菜三种不同基质的有证标准物质进行验证, 测定值均在标准值范围内, 该方法适用于植物提取物汞的快速测定。

英文摘要:

      Objective To establish a rapid determination method of mercury in the plant extract. Methods a direct mercury measurement technology, which could directly determine the samples without any pretreatments was used, and the instrument conditions were optimized. Finally detection limit, precision and accuracy of this method were researched, etc. Results Compared with the national standard GB/T 5009.17-2003 and validation of the national standard substance, the linear range of this method was 0~1000 ng, and the lowest detection limit was 0.430 μg/kg. Its relative standard deviation (RSD) was within 3.5% and the recovery was 93.5%~102.8%. Conclusion To determine the mercury in our national reference material such as tea, cabbage patch, and spi-nach, the values were all within the standard range of values. This method is suitable for the rapid determina-tion of plant extracts of mercury.