氢化物发生-原子荧光光谱法自动进样快速测定烟道灰中硒的应用研究

Application Study on Rapid Determination of Se in Chimney Ash with Automatic Sampling by Hydride Generation-Atomic Fluorescence Spectrometry

应用常规湿法消解与微波高压溶样2种不同的样品分解方法，研究了氢化物发生。原子荧光光谱法（HGAFS）测定烟道灰中的硒．硒标准系列浓度在0．000～0．024mg／L范围内与荧光强度具有良好的线性关系，相关系数为0．9998。方法检出限为0．0075mg／kg，相对标准偏差在0．87％～1．30％之间，加标回收率为98％～105％，实验证实方法具备灵敏、快速、准确等优点．亦为回收利用烟道灰中的硒提供了科学依据。

With two different sample decomposition methods of conventional wet digestion and microwave high pressure dissolution method, the determination of Se in chimney ash by HG-AFS is studied. Se standard concentration has good linear relationship with fluorescence intensity in the range of 0. 000-- 0. 024 mg/L,and corelative coefficient is 0. 999 8. Detection limit of the method is 0. 007 5 mg/kg, relative standard deviation is between 0. 87%-1. 30% ,and recovery is 98%-105%. This method has the advcontages of high sensitivity,rapidity and accuracy. It provides scientific basis for recycling use of selenium in chimney ash.