Carbon dioxide (CO₂) in nitrogen was one of the first types of gas mixtures performed at an international key comparison. The comparison dates back to 1998 (CCQMK1a) [1]. Since then, many National Metrology Institutes (NMIs) have developed Calibration and Measurement Capabilities (CMCs) for these mixtures. The international comparison of CO₂ at ambient level through CCQM-K52 was compared in 2007 [2]. Recently, NMIs in the APMP region have focused on developing emission standards for regulating CO₂ released by various powered vehicles such as automobiles (motor cars). At the 2017 APMP meeting, several NMIs requested a CO₂/N₂ comparison to establish their own standards related with automotive regulation, which was to be coordinated by KRISS. Consequently, this comparison provides a CMC for APMP regional NMIs to develop CO₂/N₂ CMC claim.

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).

氮气中的二氧化碳 (CO ₂ ) 是国际重点比较中最先进行的气体混合物类型之一。比较可以追溯到 1998 年 (CCQMK1a) [1]。从那时起，许多国家计量机构 (NMI) 已经为这些混合物开发了校准和测量能力 (CMC)。2007 年通过 CCQM-K52 对环境水平的 CO ₂进行了国际比较[2]。近来，APMP地区的NMI重点制定了排放标准，以规范汽车（机动车）等各种动力车辆排放的CO ₂。在 2017 APMP 会议上，几个 NMI 要求 CO ₂ /N ₂比较以建立自己的与汽车法规相关的标准，该标准由 KRISS 协调。因此，该比较为 APMP 区域 NMI 开发 CO ₂ /N ₂ CMC 声明提供了 CMC 。

要访问本文的正文，请单击最终报告。请注意，此文本出现在 BIPM 密钥比较数据库 https://www.bipm.org/kcdb/ 的附录 B 中。

根据 CIPM 互认安排 (CIPM MRA) 的规定，最终报告已通过同行评审并由 CCQM 批准发布。