on 05-11-201704:39 AM - edited on 11-09-202104:17 AM by usermigration2
1) State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China, 2) Isotope Laboratory, Department of Earth and Space Sciences, University of Washington, Seattle, USA Journal of Analytical Atomic Spectrometry (2014), V29, pp122-133, doi: 10.1039/C3JA50232E High-precision copper and iron isotope analysis of igneous rock standards by MC-ICP-MS Sheng-Ao Liu (1), Dandan Li (1), Shuguang Li (1), Fang-Zhen Teng (1,2) Shan Ke (1), Yongsheng He (1), and Yinghuai Lu (1) Stable isotopic systematics of Cu and Fe are two important tracers for geological and biological processes. Generally, separation of Cu and Fe from a matrix was achieved by two independent, completely different methods. In this study, we report a method for one-step anion-exchange separation of Cu and Fe from a matrix for igneous rocks using strong anion resin AG-MP-1M. Cu and Fe isotopic ratios were measured by multi-collector inductively coupled plasma mass-spectrometry (Neptune plus) using a sample–standard bracketing method. External normalization using Zn to correct for instrumental bias was also adopted for Cu isotopic measurement of some samples. In addition, all parameters that could affect the accuracy and precision of isotopic measurements were examined. Long-term external reproducibility better than ±0.05‰ (2SD) for δ65Cu and ±0.049‰ (2SD) for δ56Fe was routinely obtained.