采用微波消解-原子荧光光谱法测定玉米中的硒,考察了酸介质浓度、KBH4还原剂用量、载气流速、负高压的影响。在0~10μg/L-1范围内,硒浓度与荧光强度呈线性关系,相关系数为0.9993,加标回收率为93.4%~104.1%,硒测定结果的相对标准偏差不大于2.1%。 The content of selenium in corn was determined by microwave digestion - atomic fluorescence spectrometry. The effects of acid medium concentration, amount of KBH4 reductant, carrier gas flow rate and negative pressure were investigated. In the range of 0 ~ 10μg / L-1, there was a linear relationship between the concentration of selenium and the fluorescence intensity, the correlation coefficient was 0.9993 and the recoveries were 93.4% -104.1%. The relative standard deviation of selenium determination was no more than 2.1%.