岩矿测试2011，Vol.30Issue(4)：412-415,4.
锍镍试金-电感耦合等离子体质谱法测定硫铁矿中铂族元素
Determination of Platinum Group Elements in Pyrite Samples by Inductively Coupled Plasma-Mass Spectrometry with Nickel Sulphide Fire Assay
摘要
Abstract
Nickel sulphide fire assay is the common method to determine platinum group elements ( PGEs) for most geological samples by inductively coupled plasma-mass spectrometry (ICP-MS). However, there are few reports on pyrite samples. According to the characteristics of pyrite, which is abundant in S and Fe, routine fusion flux cannot produce an ideal nickel sulphide button, which makes the next chemical steps difficult ie dissolution and filtration. In this paper, the chemical procedure of nickel sulphide fire assay has been improved to measure the PGEs contents for pyrite by ICP-MS. The fusion flux and molten slag was changed in order to yield the ideal button without losing any of the sampling weight. The improved method gives the button the optimum capability to extract PGEs from the fusant and avoid PGEs loss from prolonged heating and reaction. As the button is easy to peel and effloresce, the procedure of button crushing is unnecessary, which not only simplifies the process, but also avoids the possibility of cross contamination. The results indicate that high content of Fe do not significantly affect the measurement of PGEs content. The whole recovery procedure was more than 94% and the detection limits of 10 g samples for Ru, Rh, Pd, Os, Ir and Pt were 0.018 ng/g, 0.017 ng/g, 0. 18 ng/g, 0.019 ng/g, 0.013 ng/g and 0. 11 ng/g, respectively. The results of different pyrite samples and standard material indicate that this method is an improvement on previous methods by meeting the requirements for PGEs determination of most pyrite.关键词
铂族元素/硫铁矿/电感耦合等离子体质谱法/锍镍试金Key words
platinum group elements/ pyrite/ inductively coupled plasma-mass spectrometry/ nickel sulphide fire assay引用本文复制引用
赵素利,张欣,李曼,温宏利,屈文俊,曹亚萍,李超..锍镍试金-电感耦合等离子体质谱法测定硫铁矿中铂族元素[J].岩矿测试,2011,30(4):412-415,4.基金项目
国土资源地质大调查项目(1212010816027) （1212010816027）
