| Title: | The impact of ammonium on the distillation of organic carbon in PM(2.5) |
| Author(s): | Feng Z; Zheng F; Yan C; Fu P; Zhang Y; Lin Z; Cai J; Du W; Wang Y; Kangasluoma J; Bianchi F; Petaja T; Wang Y; Kulmala M; Liu Y; |
| Address: | "Aerosol and Haze Laboratory, Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China. Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, Finland. Hebei Sailhero Environmental Protection Hi-Tech., Ltd, Shijiazhuang 050035, China. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. Aerosol and Haze Laboratory, Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, Finland. State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China. Aerosol and Haze Laboratory, Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China. Electronic address: liuyc@buct.edu.cn" |
| DOI: | 10.1016/j.scitotenv.2021.150012 |
| ISSN/ISBN: | 1879-1026 (Electronic) 0048-9697 (Linking) |
| Abstract: | "Thermal desorption coupled with different detectors is an important analysis method for ambient carbonaceous aerosols. However, it is unclear how the compounds coexisting in both the gas and particle phases affect carbonaceous aerosol concentrations and measurements during thermal desorption. We observed matrix effects leading to a redistribution of different OC fractions (OC1 to OC4) during the thermal desorption process. These factors led to the formation of OC with low volatility (OC4), mainly from high-volatility OC (OC1 and OC2). Laboratory studies further indicated that ammonium promotes such matrix effects by transforming OC in the particle phase. Therefore, in addition to providing insights into the chemical evolution of OC during haze events, we argue that thermal-desorption-based OC measurements should be used with caution, which is an important step towards a more accurate measurement of OC in the ambient atmosphere" |
| Keywords: | Aerosols/analysis *Air Pollutants/analysis *Ammonium Compounds Carbon/analysis Environmental Monitoring Particle Size Particulate Matter/analysis Seasons Inorganic salts Matrix effects Redistribution of components Thermal desorption; |
| Notes: | "MedlineFeng, Zemin Zheng, Feixue Yan, Chao Fu, Peng Zhang, Yusheng Lin, Zhuohui Cai, Jing Du, Wei Wang, Yonghong Kangasluoma, Juha Bianchi, Federico Petaja, Tuukka Wang, Yuesi Kulmala, Markku Liu, Yongchun eng Netherlands 2021/09/17 Sci Total Environ. 2022 Jan 10; 803:150012. doi: 10.1016/j.scitotenv.2021.150012. Epub 2021 Sep 2" |
