硫化镍火试金后用ICP-MS测定地质样品中的金和铂族元素：不同类型地质样品遇到的困难

Determination of gold and the platinum group elements in geological samples by ICP-MS after nickel sulphide fire assay: difficulties encountered with different types of geological samples.

作者信息

Juvonen R, Lakomaa T, Soikkeli L

机构信息

Geological Survey of Finland, P.O. Box 96, Betonimiehenkuja 4, Fin-02151 Espoo, Finland.

出版信息

Talanta. 2002 Sep 12;58(3):595-603. doi: 10.1016/s0039-9140(02)00330-2.

DOI:10.1016/s0039-9140(02)00330-2

PMID:18968787

Abstract

Problems involved in the determination of Au and the platinum group elements by the nickel sulphide fire assay (NiS-FA) procedure for black shale samples, samples containing magnetite, and samples containing As, Cu, and Fe were studied. The interference of the graphite in black shale samples was eliminated either by roasting the sample prior to fusion or by adding an oxidant to the fusion flux. Addition of a reducing agent to samples, containing the oxygen-rich mineral magnetite, enabled the NiS-FA procedure to be carried out for this sample type. The interference of Cu on Rh in the ICP-MS determination was corrected by establishing a linear correlation between the interference of Cu on (103)Rh and (105)Pd.

摘要

研究了采用硫化镍火试金法（NiS-FA）测定黑色页岩样品、含磁铁矿样品以及含砷、铜和铁的样品中的金和铂族元素时所涉及的问题。对于黑色页岩样品，通过在熔融前焙烧样品或在熔剂中添加氧化剂来消除石墨的干扰。向富含氧的矿物磁铁矿的样品中添加还原剂，使得能够对这种样品类型进行NiS-FA法测定。通过建立铜对（103）Rh和（105）Pd干扰之间的线性相关性，校正了ICP-MS测定中铜对铑的干扰。