Development of Two New Copper Isotope Standard Solutions and their Copper Isotopic Compositions |
| |
| Authors: | Honglin Yuan Wengting Yuan Zhian Bao Kaiyun Chen Fang Huang Shengao Liu |
| |
| Institution: | 1. State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Collaborative Innovation Centre of Continental Tectonics, Xi'an, China;2. College of Chemistry and Materials Science, Northwest University, Xi'an, China;3. CAS Key Laboratory of Crust‐Mantle Materials and Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui, China;4. State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing, China |
| |
| Abstract: | In this study, two new laboratory reference solutions for testing Cu isotopic composition were established and investigated. Two commercially available pure copper products, copper plate and copper wire, were dissolved in 1000‐ml Teflon® bottles, to produce 200 μg ml?1 stock solutions (hereafter referred to as NWU‐Cu‐A and NWU‐Cu‐B), and cryogenically stored. The Cu isotopic compositions of the two samples were determined in three different laboratories using multi‐collector inductively coupled plasma‐mass spectrometry, and the Cu isotopic compositions obtained from the standard‐sample bracketing method were consistent within the two standard deviation (2s) range. The Cu isotopic compositions of the NWU‐Cu‐A and NWU‐Cu‐B standard solutions were δ65Cu = +0.91 ± 0.03‰ (2s, n = 42) and δ65Cu = ?0.05 ±0.03‰ (2s, n = 49), respectively, relative to the reference material NIST SRM 976. |
| |
| Keywords: | copper isotopes MC‐ICP‐MS reference material stable isotope pure copper metal |
|
|
