摘要
采用微波消解-原子荧光法测定PM2．5中砷、汞含量。实验结果表明，当还原剂硼氢化钾的质量分数为2％、溶液介质酸度为4％（体积分数）盐酸时，同时测定砷、汞可获得最佳的荧光值。砷、汞测定的检出限分别为0．027，0．006μg／L，空白滤膜的加标回收率分别为95．3％～101．7％，96．0％～106．0％，样品的加标回收率分别为95．0％～103．5％，93．3％～110．0％。该法检出限低，准确度高，适用于环境空气PM2．5中砷、汞含量的测定。
Microwave digestion and atom fluorescence spectrometry were used to determine arsenic and mercury in PM2.5. The results showed that the best fluorescence intensity in simultaneous determination of arsenic and mercury was acquired as reductant KBI-L mass fraction was 2% and HCl volume fraction was 4%. The method detection limit of arsenic and mercury were 0.027, 0.006 μg/L respectively. The recovery of the blank spike samples was 95.3%-101.7% for As and 96.0%-106.0% for Hg. The recovery of the spike samples were 95.0%-103.5%, 93.3%-110.0% for As and Hg, respectively. The method has high accuracy and low detection limit, it is suitable for the determination of arsenic and mercury in PM2.5.
出处
《化学分析计量》
CAS
2013年第4期57-59,共3页
Chemical Analysis And Meterage
关键词
原子荧光光谱法
PM2
5
砷
汞
atom fluorescence spectrometry
PM2.5
arsenic
mercury
