Preprints
https://doi.org/10.5194/egusphere-2023-379
https://doi.org/10.5194/egusphere-2023-379
28 Mar 2023
 | 28 Mar 2023

Technical note: Intercomparison Study of the EC Radiocarbon Analysis Methods Using Synthetic Known Samples

Xiangyun Zhang, Jun Li, Sanyuan Zhu, Junwen Liu, Ping Ding, Shutao Gao, Chongguo Tian, Yingjun Chen, Ping'an Peng, and Gan Zhang

Abstract. The accurate identification of elemental carbon (EC) source in aerosol based on radiocarbon (14C) depends on the method of EC isolation. The lack of aerosol EC reference materials with "true" 14C values makes it impossible to evaluate the accuracy of various methods for the analysis of 14C-EC in aerosols. In this study, EC separation methods were evaluated by using samples of mixed biomass burning, vehicle exhaust and coal-combustion. The results show that 14C-EC was not only related to the separation method but also to the types and proportions of biomass sources in the sample. And the Hydropyrolysis (Hypy) method, which can be used to separate a highly stable portion of ECHypy and avoid charring, is a more effective and stable approach for the matrix-independent 14C quantification of EC in aerosols. The 13C-ECHypy and non-fossil ECHypy values of SRM1649b was 24.9 ‰ and 11 %, respectively.

Publisher's note: Copernicus Publications remains neutral with regard to jurisdictional claims made in the text, published maps, institutional affiliations, or any other geographical representation in this preprint. The responsibility to include appropriate place names lies with the authors.
Share

Journal article(s) based on this preprint

11 Jul 2023
Technical note: Intercomparison study of the elemental carbon radiocarbon analysis methods using synthetic known samples
Xiangyun Zhang, Jun Li, Sanyuan Zhu, Junwen Liu, Ping Ding, Shutao Gao, Chongguo Tian, Yingjun Chen, Ping'an Peng, and Gan Zhang
Atmos. Chem. Phys., 23, 7495–7502, https://doi.org/10.5194/acp-23-7495-2023,https://doi.org/10.5194/acp-23-7495-2023, 2023
Short summary
Download

The requested preprint has a corresponding peer-reviewed final revised paper. You are encouraged to refer to the final revised version.

Short summary
The results show that 14C-EC was not only related to the separation method but also to the types...
Share