| MC-ICP-MS高精度Cu、Zn同位素测试技术 |
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| 引用本文：侯可军，李延河,田有荣,秦 燕，谢桂青.2008.High precision Cu，Zn isotope measurements by multi_collector ICP-MS[J].Mineral Deposits,27(6):774~781 |
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| 基金项目:国家自然基金(40803001, 40873003)；国土资源大调查项目(1212010816039)；公益性科研院所基本科研业务费(K2007_2_3, Ywf060712)项目 |
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| 中文摘要:过渡族元素同位素是国际上同位素地球化学研究的热点。测试技术的限制是制约过渡元素同位素研究发展的关键。笔者利用 Neptune型多接收等离子质谱(MC_ICP_MS)，采用Cu、Zn互为内标的方法对仪器的质量歧视进行了校正，对基质效应和测试方法的重现性进行了检验，建立了高精度的Cu、Zn同位素测试技术。在5个月内对实验室标准IMR Cu和IMR Zn进行了测量，结果分别为δ65Cu NIST 976=(0.34±0.08)‰（2SD，n=32），δ66ZnJMC Zn=（-9.64±0.05）‰(2SD，n=26)，δ67ZnJMC Zn=（-14.37±0.16）‰(2SD，n=26)，δ68 Zn JMC Zn=（-19.01±0.08）‰(2SD，n=26)，分析精度达到国际同类实验室先进水平。对Cu、Zn同位素参考物质进行了对比测量，分析结果与报道值在误差范围内完全一致。 |
| 中文关键词:地球化学 Cu、Zn 同位素测定 MC-ICP-MS 质量歧视 基质效应 |
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| High precision Cu，Zn isotope measurements by multi_collector ICP-MS |
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| Abstract:Transitional metal isotope is now a new highly focused research point of isotope geochemistry, but its analytical techniques have become the main constraint on its development in recent years. Techniques for high_precision measurements of Cu, Zn isotope ratios using Neptune MC_ICPMS are reported in details in this paper, which include the correction of instrument mass bias, the assessment of matrix effects, and the long_term reproducibility. The reproducibility of the in_house standard IMR Cu and that of IMR Zn in five months are δ65Cu NIST 9.76=(0.34±0.08)‰(2SD, n=32), δ66ZnJMC Zn=(-9.64±0.05)‰(2SD, n=26), δ67ZnJMC Zn= (-14.37±0.16)‰(2SD, .n=26) and δ68Zn JMC Zn=(-19.01±0.08)‰(2SD, n=26)A study of these data in comparison with the Cu, Zn isotopes of the reference materials shows that the authors' results are in an excellent agreement with the data available. |
| keywords:geochemistry, Cu, Zn isotope measurements, MC-ICP-MS, mass bias, matrix effects |
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