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| Determination of platinum group elements in graphite samples |
| Received:November 29, 2018 Revised:February 21, 2019 |
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| DOI：doi:10.3969/j.issn.2095-1035.2019.02.009 |
| KeyWord:Graphite;rock Sulfur;nickel assay;platinum family;element Inductively;coupled plasma;mass spectrometer |
| Author | Institution |
| yangshenghong |
青海省水文地质工程地质环境地质调查院 |
| zhangming |
青海省地质矿产测试应用中心 |
| xinlianjun |
青海省水文地质工程地质环境地质调查院 |
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| Abstract: |
| Graphite rock belongs to the black rock series, and a variety of metals (including precious metals) mineralization has a close contact. According to conventional analysis methods, sulfur, nickel assay solvent formula can have better enrichment of precious metal elements, interfere with the determination of noble metal elements. In this paper, according to the composition characteristics of graphite in the rock samples, the determination of platinum group elements of conventional sulfur nickel as the formula is improved, increased potassium nitrate and magnesium oxide, and don"t need to join the osmium diluent. Through experiment chose the appropriate proportion of ingredients, melting after crushing nickel buckles, to join the hydrochloric acid decomposition, tellurium, precipitant concentration. Filter the precipitate dissolved in aqua regia. Using icp-ms determination, Lu as internal standard. For graphite platinum group elements in rock samples were determined. Recovery is between 85% and 105%. To meet the requirements for measurement of platinum group elements in graphite rock |
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