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Copper Isotope Ratio Measurements of Cu-Dominated Minerals Without Column Chromatography Using MC-ICP-MS.
- Source :
-
Frontiers in chemistry [Front Chem] 2020 Jul 16; Vol. 8, pp. 609. Date of Electronic Publication: 2020 Jul 16 (Print Publication: 2020). - Publication Year :
- 2020
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Abstract
- This study performed a series of comparable experiments (with or without column chromatography) to evaluate whether non-deviated Cu isotope ratios can be obtained directly by Nu Plasma II multi-collector inductively coupled plasma-mass spectrometry (MC-ICP-MS) using standard-sample bracketing with Ga as internal mass bias correction model (C-SSBIN) without column chromatography. Twelve Cu-dominated minerals (copper plate, native copper, chalcopyrite, bornite, chalcocite, digenite, covellite, tetrahedrite, azurite, malachite, atacamite, and cyanotrichite) displayed little drift in δ <superscript>65</superscript> Cu values compared with those of minerals with column chromatography, with Δδ <superscript>65</superscript> Cu <subscript>without-with</subscript> ranging from -0.04 to +0.02‰. This means that Cu isotope ratios in Cu-dominated minerals can be achieved without column chromatography, due to the simple matrix and the stability of the machine by using C-SSBIN mode. The acidity and internal standard concentration mismatch effects, as well as the matrix effect, were strictly assessed by Nu Plasma II MC-ICP-MS in a wet-plasma mode in the State Key Laboratory of Continental Dynamics (SKLCD). Finally, a long-term reproducibility of better than ±0.03‰ [ n = 38, 2 standard deviations (2s)] were achieved by repeatedly measuring chalcopyrite without column chromatography over 4 months.<br /> (Copyright © 2020 Zhang, Bao, Lv, Chen, Zong and Yuan.)
Details
- Language :
- English
- ISSN :
- 2296-2646
- Volume :
- 8
- Database :
- MEDLINE
- Journal :
- Frontiers in chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 32766210
- Full Text :
- https://doi.org/10.3389/fchem.2020.00609