锗矿石和铟矿石化学成分分析标准物质研制

摘要

目前国内外没有以稀散元素锗、铟为特征元素的矿石标准物质，为了满足我国地质找矿的需求，本文采集广东省韶关凡口铅锌矿作为锗矿石候选物，广西南丹铜坑铅锌矿作为铟矿石候选物，依据国家一级标准物质技术规范，由10家实验室采用化学分析方法和现代仪器分析方法协作定值，研制了1种锗矿石标准物质（GBW07831）和1种铟矿石标准物质（GBW07833）。锗矿石标准物质定值组分为45项，铟矿石标准物质定值组分为47项，包括特征元素、共存元素、稀土元素（15项）、造岩元素和痕量元素，其中锗矿石中锗含量为21．6×10－6，铟矿石中铟含量为39．7×10－6。研制的2种标准物质丰富了我国矿石标准物质的种类，可用于锗、铟矿石化学成分分析测试的量值标准和日常质量监控。%There are no ore standard materials which are characterized by the dispersed elements germanium and indium.In order to meet the need of geological exploration,Pb-Zn ores from Fankou of Guangdong were used as the candidates of Ge-ores and Pb-Zn ores from Tongkeng,Nandan of Guangxi were used as the candidates of In-ores.According to Class A standard material specifications,germanium ore (GBW07831 ) and indium ore (GBW07833)were prepared by ten laboratories using different analysis methods.Germanium ore standard contains certified values of 45 elements,whereas In-ore standard contains certified values of 47 elements.These elements include characteristic elements,coexisting elements,15 rare earth elements,rock-forming elements and trace elements.The contents of Ge and In are 21 .6 ×10 -6 and 39.7 ×10 -6 ,respectively in the germanium and indium ores.The two standard materials extend the types of ore standard material in China,which can be used as a chemical composition standard for Ge and In ores and used in daily quality control.