Final report for CCQM-P212: coherence of carbon isotope delta reference materials

IF 2.1 3区工程技术 Q2 INSTRUMENTS & INSTRUMENTATION

Metrologia Pub Date : 2023-11-23 DOI:10.1088/0026-1394/60/1a/08028

Michelle M G Chartrand, Fong-Ha Liu, Jeffrey P Merrick, Maíra Fasciotti, Bruno Carius Garrido, Eliane Cristina Pires do Rego, Thays Vieira da Costa Monteiro, Wagner Wollinger, Heiko Moossen, Heike Geilmann, Ian Chubchenko, Anna Kolobova, Nives Ogrinc, Doris Potočnik, Philip J H Dunn, Heidi Goenaga-Infante, Sarah Hill, Dmitriy Malinovsky, Zoltán Mester, Juris Meija

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引用次数: 0

Abstract

Main textThis pilot study evaluates the coherence of carbon isotope delta reference materials (RMs) used by laboratories worldwide. The goal was to assess how well laboratories can realize the VPDB scale using these RMs. In total, carbon isotope delta values of 36 RMs were measured by seven laboratories as well as the vanillin sample previously evaluated in CCQM-K167/P211. A hierarchical Bayesian measurement model was used to evaluate the coherence between these RMs, and to determine the carbon isotope delta value of each of these RMs. In general, this study shows that the 36 carbon isotope delta RMs are reliable. Further, the value assigned to the vanillin sample in this study is within 0.02 ‰ from the CCQM-K167 KCRV.To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database https://www.bipm.org/kcdb/.The final report has been peer-reviewed and approved for publication by the CCQM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).

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CCQM-P212最终报告：碳同位素三角参考材料的一致性

正文这项试点研究评估了全球实验室使用的碳同位素三角参考材料（RMs）的一致性。目的是评估实验室使用这些参考物质实现 VPDB 量表的能力。七家实验室总共测量了 36 种 RM 的碳同位素δ值，以及之前在 CCQM-K167/P211 中评估过的香兰素样品。采用分层贝叶斯测量模型评估了这些 RM 之间的一致性，并确定了每个 RM 的碳同位素δ值。总体而言，这项研究表明 36 个碳同位素δRM 是可靠的。此外，本研究中分配给香兰素样品的值与 CCQM-K167 KCRV 的值在 0.02 ‰以内。请注意，此文本为 BIPM 关键比对数据库附录 B 中的文本 https://www.bipm.org/kcdb/.The 根据 CIPM 互认安排（CIPM MRA）的规定，最终报告已通过同行评审，并批准由 CCQM 发布。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Metrologia 工程技术-物理：应用

CiteScore

2.80

自引率

25.00%

发文量

137

审稿时长

12 months

期刊介绍： Published 6 times per year, Metrologia covers the fundamentals of measurements, particularly those dealing with the seven base units of the International System of Units (metre, kilogram, second, ampere, kelvin, candela, mole) or proposals to replace them. The journal also publishes papers that contribute to the solution of difficult measurement problems and improve the accuracy of derived units and constants that are of fundamental importance to physics. In addition to regular papers, the journal publishes review articles, issues devoted to single topics of timely interest and occasional conference proceedings. Letters to the Editor and Short Communications (generally three pages or less) are also considered.