| Fe同位素的MC-ICP-MS测试方法 |
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| 引用本文：侯可军,秦燕,李延河.2012.Fe同位素的MC-ICP-MS测试方法[J].地球学报,33(6):885-892. |
| DOI：10.3975/cagsb.2012.06.06 |
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| 基金项目:国家自然科学基金青年基金(编号: 40803001) |
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| 中文摘要:过渡族元素同位素研究是新兴的研究领域和国际研究前沿, 是同位素地球化学研究的热点。本研究利用Neptune型多接收等离子质谱(MC-ICP-MS), 采用标准-样品-标准交叉校正和以Cu为内标的方法对仪器的质量歧视进行校正, 对浓度效应、基质效应、干扰元素扣除和测试的长期重现性进行了检验, 建立了高精度的Fe同位素测试技术。这两种校正方法对实验室标准HSP I Fe在一段时间内δ56Fe和δ57Fe的测试结果分别为0.08‰(2SD)和0.14‰(2SD)分析精度达到国际同类实验室水平, 测试结果在误差范围内与文献值完全一致。 |
| 中文关键词:Fe同位素 MC-ICP-MS 质量歧视 基质效应 |
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| High-precision Measurements of Fe Isotopes Using MC-ICP-MS |
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| Abstract:Transitional metal isotope is now a new highly focused research point of isotope geochemistry, but analytical techniques have become the main constraint on its development in recent years. Techniques for high-precision measurements of Fe isotope ratios using Neptune MC-ICP-MS have been reported in details, which include correction of instrument mass bias, assessments of matrix effects, concentration effects and long-term reproducibility. The reproducibilities of the in-house Fe standard HSP I in one month under two different mass bias correct modes (SSB, standard-sample-bracketing and Cu-doped SSB) are δ56FeIRMM-014=0.52‰±0.07‰ (2SD, N=19), δ57FeIRMM-014=0.80‰±0.14‰ (2SD, N=19) and δ56FeIRMM-014=0.54‰±0.08‰ (2SD, N=29), δ57FeIRMM-014=0.84‰±0.13‰ (2SD, N=29), respectively. The resulting Fe isotope ratios for the reference materials show an excellent agreement with the previously reported data. |
| keywords:Fe isotope MC-ICP-MS mass bias matrix effects |
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