摘要
应用氢化物发生-原子荧光光谱法同时测定滑石中痕量砷和汞,并对样品的浸取方法及共存元素和实验奈件进行了研究。结果表明,用浓盐酸浸取样品,砷、汞溶出量最大;加入硫脲-抗坏血酸溶液后,滑石中共存元素铝、铁、钙、铜、铅、镉不干扰砷、汞的测定。方法的检出限为砷0.047 mg/L,汞3.9 ng/L;回收率为砷107.5%～109.2%,汞103.3%～130.0%;精密度(RSD,n=11)为砷0.6%,汞0.7%。建立的氢化物发生-原子荧光光谱同时测定滑石中砷、汞含量的分析方法能满足日常检验的要求。
A method for the simultaneous determination of arsenic and mercury in talclum by hydride generation-atomic fluorescence spectrometry （HG-AFS） was established. Hydrochloric acid was used to dissolve the sample and the addition of thiourea-ascorbie acid can effectively eliminate the interference from coexisting elements such as Al, Fe, Ca, Cu, Pb, Cd in talclum. The detection limits of the method are 0. 047 mg/L for As and 3.9 ng/L for Hg. The recoveries are 107.5%-109.2% for As and 103.3%-130.0% for Hg with the precision of 0.6% RSD for As and 0.7% RSD for Hg （n=11）. The method can be used in routine inspection of As and Hg in talclum samples.
出处
《岩矿测试》
CAS
CSCD
2008年第5期389-391,共3页
Rock and Mineral Analysis
基金
国家认监委制标项目资助(2005-B044)
关键词
氢化物发生-原子荧光光谱法
砷
汞
滑石
hydride generation-atomic fluorescence spectrometry
arsenic
mercury
talclum
