碘化铵挥发-原子荧光光谱法测定铅锌矿中的锡

Determination of Tin in Lead-zinc Mine by the Volatilization of Ammonium Iodide-Atomic Fluorescence Spectrometry

利用锡与碘化铵生成四碘化锡挥发可与大部分无机元素分离的特性，采用原子荧光光谱法测定铅锌矿石中的锡。对5个国家一级标准物质GBW07832、GBW07312、GBW07406、GBW07311、GBW07833中的锡进行测定，从而进行方法准确度及精密度的检验。测定结果与标准值相符，相对标准偏差小于5％，加标回收率在96．0％～105．6％之间。

The Atomic Fluorescence Spectrometry was used to determine the tin in lead-zinc mine, due to ammonium iodide with tin generating tin tetra iodide, which was volatile and can be separated from most of the inorganic elements. Tin in 5 standard reference substance GBW07832, GBW07312, GBW07406, GBW07311 and GBW07833, were also determined according to this way and the result was in good agreement with standard value. The relative standard deviation was less than 5%, and the recovery rate of standard addition were between 96%-105.6%.