摘要
铜铅锌矿石样品中加入硝酸、盐酸、氢氟酸、高氯酸,在封闭消解杯中处理后,再加硫酸冒烟,盐酸提取,稀释后用电感耦合等离子体质谱(ICP-MS)法测定其中的稀土元素,并用铑和铱作内标元素补偿基体效应和灵敏度漂移。根据铜铅锌矿石标准参考物质(GBW07233～GBW07237)的分析结果评价方法的准确度和精密度,对标准物质的测定值与标准值基本一致,方法相对标准偏差(RSD)为1.2%～7.6%,符合地质样品分析规范要求。方法检出限为0.001～0.011μg/g。
Determination of rare earth elements in copper,lead and zinc ores was studied by inductively coupled plasma mass spectrometry（ICP-MS）.The samples were digested in a closed PTFE digestion vessel by HCl-HNO_3-HF-HClO_4.H_2SO_4 was added to the digestion solution and heated until it gave off a large quantity of white smoke,then the residue was extracted by HCl.The use of Rh and Ir as internal standards compensated matrix interferences and sensitivity drift.The method was validated by the analysis of certified reference materials（certified samples of rare earth elements in copper,lead and zinc ores,GBW07233～ GBW07237）.The results agreed well with the reference values.The relative standard deviations（RSDs）were 1.2%～7.6% with 0.001～0.011μg/g detection limits.The method could meet the requirement of analytical criteria of geological samples.
出处
《中国无机分析化学》
CAS
2016年第1期26-29,共4页
Chinese Journal of Inorganic Analytical Chemistry
基金
国家科学仪器设备重大专项(2011YQ06010009)资助
关键词
电感耦合等离子体质谱法
铜铅锌矿
稀土元素
封闭溶样
inductively coupled plasma mass spectrometry
copper
lead and zinc ores
rare earth elements
sealed dissolution
