摘要
采用乙酸乙酯萃取分离金基体,用电感耦合等离子体质谱(ICP-MS)内标法测定高纯金中31种杂质元素。萃取酸度为1 mol/L HCl,用25 mL乙酸乙酯可去除金基体对待测元素的干扰,对金的萃取率大于99.9%。将31种元素用^(45)Sc、^(133)Cs、^(159)Tb、^(187)Re等4个内标元素分组测定。方法检出限为0.25μg/L,定量限为0.83μg/L,精密度(RSD,n=12)为0.31%~5.97%,加标回收率为95.3%~109.2%。可满足99.999%的高纯金样品中杂质元素含量的检测。
The gold matrix was extracted and separated by ethyl acetate solvent,and 31 impurity elements in high purity gold were determined by inductively coupled plasma mass spectrometry(ICP-MS).The extraction rate of gold was more than 99.9%when gold solution was extracted by 25 mL ethyl acetate in 1 mol/L HCl solution.31 impurities were divided into 4 groups with^(45)Sc,^(133)Cs,^(159)Tb,^(187)Re as internal standard elements.The method has a detection limit(DL)of 0.25μg/L,limit of quantitation(LOD)of 0.83μg/L,precision(RSD,n=12)range of 0.31%~5.97%,and standard recovery ratio of 95.3%~109.2%.The method can satisfy the determination of impurities in 99.999%high purity gold samples.
作者
洪博
陈永红
芦新根
苏广东
杨星
张越
尹春雨
HONG Bo;CHEN Yong-hong;LU Xin-gen;SU Guang-dong;YANG Xing;ZHANG Yue;YIN Chun-yu(National Quality Supervisition and Inspection Center for Gold and Silver Products(Changchun),Changchun Gold Research Institute Co.Ltd.,Changchun 130012,China)
出处
《贵金属》
CAS
北大核心
2021年第2期67-71,83,共6页
Precious Metals
