氢化物发生-原子荧光光谱法测定煤样中的硒

摘要

This paper proposed a sensitive and simple method for the determination of total selenium in coal samples by hydride generation atomic fluorescence spectrometry (HG-AFS). The detection limit was 0.40μg/L with linear range of 0～400μg/L for Se. The method has been validated by analysis of standard reference coal fly ash with precision of less than 4.5% RSD(wSe=10-6,n=4) and has been successfully used for the determination of total selenium in coal samples from different sampling sites.%采用氢化物发生原子荧光光谱法测定了煤样中的总Se。煤样先用高压闷罐强酸消解的方法进行处理，所得消解液经6mol/L?HCl将Se(Ⅵ)还原为Se(Ⅳ)，然后进行测定。标准工作曲线的线性范围为0～400μg/LSe，检测限为0.40μg/LSe。用标准参考物质煤飞灰对方法进行了验证，所得总Se含量与标准值相符，对w为10-6级Se的4次测定，RSD≤4.5 %。