热解析冷原子吸收光谱法测定烟用材料中总汞

Determination of Total Mercury in Tobacco Materials by Thermal Decomposition and Cold Atomic Absorption Spectrometry

摘要: 采用热解析冷原子吸收光谱汞直接测量法测定了烟丝、滤棒、包装材料、香精和接装纸等烟用材料样品中的总汞含量。结果表明:①汞的检出限0.038μg/kg;回收率97.6%~103.0%;RSD0.59%~2.47%;测量范围0~1000μg/L;②直接测量结果略高于消化处理的样品,与消解-原子荧光光谱(AFS)法无明显差异;③所测烟用材料样品中的总汞含量为0.48~97.16μg/kg。该法适用于批量烟用材料样品中总汞含量的快速分析。

Abstract: The contents of total mercury(Hg) in various tobacco materials,such as cut tobacco,filter rod,packaging,flavor,and tipping paper,were determined by thermal decomposition and cold atomic absorption spectrometry.The results showed that:1) The recoveries of Hg were from 97.6% to 103.0% with the RSD of 0.59% to 2.47% and the limit of detection of 0.038μg/kg in the span of 0 to 1000μg/L.2) The directly measured results were slightly higher than those found in digested samples;and not obviously different from those by digestion-atomic fluorescence spectrometry.3) The contents of total Hg in tested samples were in the range of 0.48 to 97.16μg/kg.The method is suitable for fast analysis of total Hg in batches of tobacco material samples.