硫化物矿物中多组分元素ICP-MS测定方法研究^*

Study of ICP-MS Detection about Trace Elements and Noble Metal Elements in Sulfides*

摘要: 本文通过利用中国地质大学(北京)ICP-MS实验室的超净化学实验室、Agilent 7500a型ICP-MS和与天津一同电子工程设备厂共同研制的高压反应釜，进行了多种溶样方法、稀释倍数、仪器检测条件的对比实验，基本建立了硫化物(100 mg)双王水高压反应釜酸溶溶样方法和2000倍稀释ICP-MS检测方法。多个标准物质测定值与参考值符合较好，相对标准偏差RSD < 5%，可一次性分析获得黄铁矿等硫化物中稀土、大离子亲石元素、高场强元素和Au、Ag等贵金属元素含量。

Abstract: Various experiments were carried out in this paper, which involved combining super purified laboratory and Agilent 7500a type ICP-MS in China University of Geosciences Beijing. High pressure tax produced by Tianjin Yitong electronic factory and ICP-MS laboratory in China University of Geosciences Beijing was also utilized. Based on a variety of experiments about sample dissolution, dilution multiples and instrument detection conditions, the method of sulfide (100 mg) with aqua regia of acid solution in high pressure tax and the method of ICP-MS detection under 2000 times dilution were established. The results demonstrated that detections of standards coincided well with the given values and the relative standard deviations (RSD) were below 5%. In this study, the values of rare earth elements, lithophile elements, high field strength elements and Au, Ag in sulfides such as pyrite could be analyzed in single experiment process.