采用密闭消解-氢化物发生-原子荧光光谱法测定植物中硒的含量。植物样品采用硝酸-过氧化氢（2+1）混合液于130℃密闭消解4 h，以10 g·L^-1硼氢化钠溶液作为还原剂。硒的质量浓度在2~10 μg·L^-1内与其对应的荧光强度呈线性关系，检出限（3s/k）为0.18 μg·L^-1。对10 μg·L^-1的硒标准溶液连续测定6次，测定值的相对标准偏差为0.63%。以圆白菜标准物质（GBW 10014）为基体进行加标回收试验，所得回收率为102%。

HG-AFS was applied to the determination of selenium in plants with closed digestion. The plant sample was digested closedly for 4 h with the mixture of HNO₃-H₂O₂ (2+1) at 130℃. 10 g·L^-1 NaBH₄ solution was used as reductant. Linear relationship between values of fluorescence intensity and mass concentration of selenium was kept in the range of 2-10 μg·L^-1, with detection limit (3s/k) of 0.18 μg·L^-1. Precision of the method was tested at the concentration level of 10 μg·L^-1 selenium standard solution for 6 determination and value of RSD found was 0.63%. On the base of standard material of cabbage (GBW 10014), test for recovery was made by standard addition method. Value of recovery found was 102%.