氢化物发生原子荧光光谱法测定三七中的砷

Determination of Arsenic in Notoginseng by Hydride Generation Atomic Fluorescence Spectrophotometry

采用硝酸、高氯酸混合酸消解试样 ,氢化物发生原子荧光光谱法测定三七中的砷 ,并对仪器的工作条件、盐酸、还原剂用量、共存元素的干扰进行了试验。方法的检出限为 7.4 ng· g-1;测定精密度为 4 .67%— 7.0 1 % ;回收率在 97%— 1 0 1

The content of arsenic in notoginseng was determined by hydride generation atomic fluorescence spectrophotometry.The sample was dissolved by nitric acid and perchloric acid.The instrument conditions and influence of reagent were tested.The detection limit is 7.4ng·g -1,the relative standard deviation is 4.67% and 7.01%,the recovery is in the range of 97%-101%.