交换树脂——活性炭动态吸附无火焰原子吸收法测定矿石中微量金、铂、钯的研究

Research on the Determination of Trace Gold,Platinum and Palladium in Ores by Flameless Atomic Absorption Spectrometry Using Dynamic Adsorption with Ion Exchange Resin and Activated Carbon

使用717阴离子交换树脂与活性炭联合富集分离技术,对矿石中微量Au、Pt、Pd采用无火焰原子吸收仪对富集后的样品以盐酸(HCl)作为介质进行测定。金(Au)的回收率达到100%,铂(Pt)的回收率为95%,钯(Pd)的回收率为96%,对国家标准物质进行分析,测定结果与标准值相符。对GBW07291国家标准物质进行7次重复测定,Au的相对标准偏差(RSD)为8.3%,Pt的RSD为9.3%,Pd的RSD为3.0%。本方法适用于矿石中Au、Pt、Pd含量在10-6至10-9级别的痕量分析,该方法具有良好的准确性和精密度。

Using a combined enrichment and separation technique with 717 anion exchange resin and activated carbon,trace amounts of Au,Pt,and Pd in ore samples were determined by flameless atomic absorption spectrometry with hydrochloric acid(HCl)as the medium.The recovery rate of gold(Au)reached 100%,platinum(Pt)was 95%,and palladium(Pd)was 96%.Analysis of national standard materials showed that the measured results were consistent with the standard values.Seven repeated determinations of GBW07291 national standard material resulted in a relative standard deviation(RSD)of 8.3%for Au,9.3%for Pt,and 3.0%for Pd.This method is suitable for trace analysis of Au,Pt,and Pd in ore samples with concentrations ranging from 10-6 to 10-9 levels,demonstrating good accuracy and precision.