固体进样测汞装置与原子荧光联用测定海产品中的汞

Solid sampling atomic fluorescence spectrometry for mercury analysis in marine products

介绍一种测定汞的"热解析-汞在线捕获-二次热解析-原子荧光"(PTP-AFS)分析方法 ,采用该方法测定了海带、紫菜、牡蛎、扇贝、大虾等实际样品中的汞,测量的结果与"氢化物发生-原子荧光法"测定的结果比对表明:该方法准确性高、重复性好,并且是一种免消解的固体进样技术,没有复杂的样品前处理过程,全过程未引入化学试剂,是一种高效、环保的分析方法。方法检出限为0.0002mg·kg^(-1),相对标准偏差3.2%(0.5ng Hg),样品加标回收率介于89.5%~103.5%。

In this paper,a new method for the determination of mercury in marine products with PTPAFS was introduced.This method can be used to analyze trace mercury in solid samples,without the introduction of chemical reagents and complicated sample pretreatment.The detection limit is 0.0002 mg kg^（-1）,the relative standard deviation is 3.2%（0.5ng Hg）,and the spiked recoveries are between 89.5%-103.5%.