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- Title
Technical note: Intercomparison study of the elemental carbon radiocarbon analysis methods using synthetic known samples.
- Authors
Zhang, Xiangyun; Li, Jun; Zhu, Sanyuan; Liu, Junwen; Ding, Ping; Gao, Shutao; Tian, Chongguo; Chen, Yingjun; Peng, Ping'an; Zhang, Gan
- Abstract
The accurate identification of elemental carbon (EC) sources in aerosol based on radiocarbon (14 C) depends on the method of EC isolation. The lack of aerosol EC reference materials with "true" 14 C values makes it impossible to evaluate the accuracy of various methods for the analysis of 14 C-EC in aerosols. In this study, EC isolation methods were evaluated by using samples of mixed biomass burning, vehicle exhaust, and coal combustion. The results show that 14 C-EC was not only related to the isolation method but also to the types and proportions of biomass sources in the sample. The hydropyrolysis (Hypy) method, which can be used to isolate a highly stable portion of EC Hypy and avoid charring, is a more effective and stable approach for the matrix-independent 14 C quantification of EC in aerosols. The 13 C-EC Hypy and non-fossil EC Hypy values of Standard Reference Material (SRM) 1649b were -24.9 ‰ and 11 %, respectively.
- Subjects
CARBON analysis; CARBON isotopes; BIOMASS burning; COAL combustion; CARBONACEOUS aerosols; REFERENCE sources; AEROSOLS; COMBUSTION
- Publication
Atmospheric Chemistry & Physics, 2023, Vol 23, Issue 13, p7495
- ISSN
1680-7316
- Publication type
Article
- DOI
10.5194/acp-23-7495-2023