Δ114/110Cd Values of a Suite of Different Reference Materials. Issue 3 (4th May 2021)

• Record Type: Journal Article
• Authors: Lu, Zhuo; Zhu, Jian‐Ming; Tan, Decan; Wang, Xiangli; Zheng, Zhibin
• Is Part Of: Geostandards and geoanalytical research. Volume 45:Issue 3(2021)
• Page Start: 565
• Page End: 581
• Publication Date: 2021-05-04
• Subjects: Cd isotopes -- reference materials -- δ114/110 Cd -- double spike -- MC‐ICP‐MS; Analytical geochemistry -- Periodicals; Géochimie analytique -- Périodiques; 551.9
• DOI: 10.1111/ggr.12380
• Languages: English
• ISSNs: 1639-4488

Abstract

Abstract : The δ 114/110 Cd values of thirty‐four environmental and geological reference materials, including rocks, sediments, soils and biological samples, were determined on a Neptune Plus MC‐ICP‐MS instrument using a 111 Cd‐ 113 Cd double spike technique. An intermediate measurement precision of better than ± 0.074‰ (2 s ) was achieved with different reference materials (RMs) of highly variable matrices and Cd contents. The uncertainty of δ 114/110 Cd values was assessed by calculating the 95% confidence interval of the results from this study and the literature using Student's t ‐test. Our measurements of nine previously analysed RMs yielded δ 114/110 Cd values that were indistinguishable from previous results. New reference values for the thirty‐four geological and biological RMs are reported here. The comprehensive data set for these RMs provides guidelines for quality assurance and inter‐laboratory comparison for Cd isotope determination. The large range of δ 114/110 Cd values in rock (−0.001 to +0.287‰) and biological RMs (−0.806 to +0.142‰) suggests that Cd isotope ratio measurement results are a useful tool to study biogeochemical processes. Abstract : Key Points Recommended δ 114/110 Cd values for nine geological reference materials are presented. δ 114/110 Cd values of twenty‐five geological reference materials ranging from −0.806‰ to 0.287‰ are newly reported. NIST SRM 2711a, GSMC‐2, JSd‐2 GSB‐15 and GSB‐29 can serve as candidate RMs for Cd isotope inter‐laboratory calibration.