混酸捕集-原子吸收光谱法测定主流烟气中的铅和镉
Chinese Journal of Spectroscopy Laboratory(2011)
Abstract
研究建立了用盐酸-硝酸混酸捕集主流烟气中铅和镉,并用原子吸收光谱法测定其含量的方法.对主流烟气中铅和镉的捕集条件和捕集液处理条件进行优化,并与常用的剑桥滤片法进行比较,对原子吸收光谱法测定主流烟气中铅和镉含量的回收率、精确度进行了试验,同时选取了5个烤烟型和1个混合型卷烟样品进行检测实验.结果表明:用10%盐酸+5%硝酸溶液捕集主流烟气中的铅和镉,捕集液水浴沸腾消解3h,原子吸收光谱法测定,平行测定相对标准偏差均小于10%,样品测定的相对标准偏差铅在5.3%-10.7%之间,镉在4.5%-10.1%之间;方法平均回收率铅为94.7%,镉为102.0%.
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Key words
Mainstream Smoke,Cadmium,Atomic Absorption Spectrometry,Lead
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