Development of Two New Copper Isotope Standard Solutions and their Copper Isotopic Compositions. Issue 1 (9th August 2016)

• Record Type: Journal Article
• Authors: Yuan, Honglin; Yuan, Wengting; Bao, Zhian; Chen, Kaiyun; Huang, Fang; Liu, Shengao
• Is Part Of: Geostandards and geoanalytical research. Volume 41:Issue 1(2017)
• Page Start: 77
• Page End: 84
• Publication Date: 2016-08-09
• Subjects: copper isotopes -- MC‐ICP‐MS -- reference material -- stable isotope -- pure copper metal; Analytical geochemistry -- Periodicals; Géochimie analytique -- Périodiques; 551.9
• DOI: 10.1111/ggr.12127
• Languages: English
• ISSNs: 1639-4488

Abstract

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 (2 s ) range. The Cu isotopic compositions of the NWU‐Cu‐A and NWU‐Cu‐B standard solutions were δ 65 Cu = +0.91 ± 0.03‰ (2 s, n = 42) and δ 65 Cu = −0.05 ±0.03‰ (2 s, n = 49), respectively, relative to the reference material NIST SRM 976. Key Points: Two different copper isotope solutions were prepared using commercially available pure copper plate and copper wire. The Cu isotopic ratios of the two copper standard solutions NWU‐Cu‐A and NWU‐Cu‐B, were measured in three different laboratories and were δ 65 CuNWU‐Cu‐A = +0.91 ± 0.03‰, (2 s, n = 42), and δ 65 CuNWU‐Cu‐B = −0.05 ± 0.03‰, (2 s, n = 49) (reference material, NIST SRM 976).