| 地质样品中铬的化学分离及双稀释剂法铬同位素测定 |
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| 关键词:chromium isotope separation chemistry double-spike MC-ICP-MS |
| 基金项目:国家自然科学基金项目(编号: 41873027; 41430104);中国地质调查局地质调查项目(编号: DD20190002);自然资源部深地动力学重点实验室自主研究课题(编号: J1901-20-1);国家重点研发计划项目(编号: 2019YFA0708404) |
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| 摘要: |
| Chromium Separation and Chromium Isotope Determination of Geological Materials Using Double Spike MC-ICP-MS |
| A method for high-precision isotope measurement of Cr isotope compositions using multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS) was developed. The chromium has 3 elution peaks in the purification process, implying that there exist at least 3 kinds of complex in HCl solution. The Al and Ti have a risk of overloading but no effect on the precision of Cr isotope composition in shale samples. The composition of 50Cr-54Cr double spike is determined by NIST SRM 979, 50Cr/52Cr=41.66, 54Cr/52Cr=22.28. The δ53Cr of NIST 3112a is –0.063±0.05‰ (2SD, N=22). The Cr isotope composition of basalt, dunite and peridotite geological reference is in agreement with the published data. |
| LI Wei-dong,ZHAO Xi-tao,YANG Yan,WU Zhen-han.2020.Chromium Separation and Chromium Isotope Determination of Geological Materials Using Double Spike MC-ICP-MS[J].Acta Geoscientica Sinica,41(5):630-636. |
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