提出了微波消解样品-蒸气发生-原子荧光光谱法测定石脑油中砷和汞的方法.采用微波消解法处理样品,优化了微波消解条件和仪器工作条件,解决了消解液中过剩酸对测定的干扰.砷、汞的检出限分别为0.11,0.045 μg·L-1;线性范围分别在1.0~100.0,0.5~50.0 μg·L-1之间,砷和汞的相对标准偏差均小于4%,回收率分别在95.2%~97.2%,92.9%~95.2%之间.

In this paper,an analytical method based on microwave assisted sample digestion-vapor generation-atomic fluorescence spectrometry was proposed for the determination of arsenic and mercury in naphtha.Digestion parameters and working conditions were optimized.Interferences due to coexisting ions were studied,values of detection limit found were 0.11 μg·L-1 for arsenic and 0.045 μg·L-1 for mercury.Linearity of the calibration curves were in range of 1.0-100 μg·L-1 for arsenic and 0.5-50.0 μg·L-1 for mercury.Values of RSD′s of sample analysis were less than 4% for both arsenic and mercury.Values of recovery were in the ranges of 95.2%-97.2% for arsenic and 92.9%-95.2% for mercury.