HG-AFS测定辣木中的Se

HG-AFS Determination of Selenium in Moringa Oleifera

采用湿法消解，HGAFS法（氢化物发生原子荧光光谱法）对辣木中微量Se含量进行了分析测定，系统地考察了消化方式、仪器工作条件、酸介质、掩蔽剂等因素对测定的影响，确定了最佳测定条件，结果表明：方法的最低检出限为0．42ng·mL^-1，线性范围0-120ng·mL^-1，相对标准偏差（RSD）为3．53％（n=11），回收率为95．2~104．6％，表明该方法有较高灵敏度，并且简便、快速、准确。

The Se content in Moringa oleifera was studied by hydride generation atom fluorescence spectrometry（HG-AFS） with wet digestion. The effects of the way of digestion, the work condition of apparatus, the reaction medium and acidity, and the reducing agent and masking agent on the determination of Se were investigated. And the operating condition of apparatus was optimized. The results showed that the detection limit of Se in this method was 0. 42 ng · mL^-1 in the linear ranger of 0-120 ng · mL^-1, the relative standard deviation was 3.53%（n= 11）, and the recovery of the method was 95. 2%-104. 6%. It was showed that the method was very sensitive, simple, rapid and accurate.