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HSPIFe在一段时间内δ^56Fe和δ^57Fe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。

英文摘要：

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 δ^56FeIRMM-014=0.52‰±0.07‰ （2SD, N=19）, δ^57FeIRMM-014=0.80‰±0.14‰ （2SD, N=19） and δ^56FeIRMM-014=0.54‰±0.08‰ （2SD, N=29）, δ^57FeIRMM-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.