岩矿测试2011，Vol.30Issue(6)：723-726,4.
锍镍试金富集-电感耦合等离子体质谱法测定黑色页岩中的铂族元素
Determination of the Platinum Group Elements in Black Shale by Inductively Coupled Plasma-Mass Spectrometry with Nickel Sulphide Fire-assay
摘要
Abstract
According to the characteristics of black shale with high abundants in C, S, Ni, Fe and Mo, the conventional reagent formula does not provide an ideal nickel sulphide button, which affects the accuracy of PGEs values. The improved reagent formula and optimized procedure of nickel sulphide fire assay have been developed for the determination of PGEs in black shale samples by Inductively Coupled Plasma-Mass Spectrometry ( ICP-MS ). The addition of Potassium nitrate as an oxidant of the fusion flux increases the recovery of PGEs by about 10%. After digestion by HC1, there was still a great amount of precipitations on the bottom of the beaker. This problem was resolved by adding a moderate amount of ferric chloride ( about 2-3 mL ) with a hot solution and stirring. The detection limits of the method for PGEs are 0. 054 ng/g for Ru, 0. 040 ng/g for Rh, 0.40 ng/g for Pd, 0. 032 ng/g for Ir, 0. 27 ng/g for Pt and 0. 026 ng/g for Os. The research results of different black shale samples are in good agreement with the reference values, showing that the method is reliable for determining the PGEs in black shale samples.关键词
黑色页岩/铂族元素/锍镍试金/电感耦合等离子体质谱法Key words
black shale/ platinum group elements/ nickel sulphide fire-assay/ inductively coupled plasma-mass spectrometry引用本文复制引用
赵素利,张欣,温宏利,李超,屈文俊..锍镍试金富集-电感耦合等离子体质谱法测定黑色页岩中的铂族元素[J].岩矿测试,2011,30(6):723-726,4.基金项目
$国土资源地质大调查项目(1212010816027) （1212010816027）
