原子吸收分光光度法测定接装纸中的砷、铅

Determination of Arsenic and Lead in Tipping Paper with Atomic Absorption Spectrometry

建立了用氢化物发生器一、石墨炉一原子吸收分光光度法测定接装纸中砷、铅含量的方法。结果表明：①铅测定最佳条件为样品中硝酸浓度1．0％（体积分数），添加基体改进剂；②砷测定最佳条件为样品中硝酸浓度0．05mol／L，硼氢化钠浓度2．0％（质量分数），载液中盐酸浓度5．0％（体积分数）；③砷、铅的相对标准偏差≤6．65％，回收率在96．0％～103．0％之间。

The methods for determining arsenic and lead in tipping paper with hydride generator atomic absorption spectroscopy or graphite furnace atomic absorption spectrometry were established. The results showed that ： 1 ） the optimal determining condition for lead was ： concentration of HNO3 in sample was 1.0% （v/v） and added with matrix improver; 2） the optimal condition for arsenic determination was ： concentrations of HNO3 was 0.05mol/L and that of NaBH4 was 2.0% （g/g） in sample, concentration of HC1 in carrying solution was 5.0% （v/v） ; and 3） the recoveries of arsenic and lead were in the range of 96.0% -103.0% with RSD≤6.65%