气候变化领域集成服务门户(CCPortal): Unambiguous identification of N-containing oxygenated organic moleculesusing a chemical-ionization Orbitrap (CI-Orbitrap) in an eastern Chinese megacity

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DOI	10.5194/acp-23-3233-2023
	Unambiguous identification of N-containing oxygenated organic moleculesusing a chemical-ionization Orbitrap (CI-Orbitrap) in an eastern Chinese megacity
	Lu, Yiqun; Ma, Yingge; Huang, Dan Dan; Lou, Shengrong; Jing, Sheng'ao; Gao, Yaqin; Wang, Hongli; Zhang, Yanjun; Chen, Hui; Chang, Yunhua; Yan, Naiqiang; Chen, Jianmin; George, Christian; Riva, Matthieu; Huang, Cheng
发表日期	2023
ISSN	1680-7316
EISSN	1680-7324
起始页码	3233
结束页码	3245
卷号	23 期号:5 页码:13
英文摘要	Oxygenated organic molecules (OOMs) are dominated by the N-containing species in polluted urban environments. As N-containing OOMs, especially those with more than one nitrogen atom, prevail in the high m/z (mass-to-charge) range (m/z > 350 Th), unambiguous identification of N-containing OOMs is highly desirable for understanding of their formation processes, precursors and influencing factors. To achieve this, we applied an ultra-high-resolution chemical-ionization Orbitrap (CI-Orbitrap) in a field campaign and found that OOMs contain one (1N-OOMs), two (2N-OOMs) and three (3N-OOMs) nitrogen atoms comprised 50 %, 26 % and 4 %, respectively, of total OOMs. More interestingly, the fraction of 2N-OOMs increased with the increase in carbon number (nC) and was dominated by the ones derived from aliphatic precursors (2N-OOMAli, 64.2 %), indicating the importance of multistep oxidation. Plausible precursors of 2N-OOMs were aliphatics (2N-OOMAli, 64.2 %), aromatics (2N-OOMAro, 16 %) and monoterpenes (2N-OOMMT, 15.4 %). The absolute concentrations of 2N-OOMs were greatly affected by the pollution level for most cases. The 2N-OOMAli was the most abundant 2N-OOM, and its fraction even increased on the polluted day with an enhanced proportion of the ones with nC > 10. While 2N-OOMAli and 2N-OOMAro were dominated by daytime photochemical production, nighttime NO3-initiated oxidation played a comparable role to the daytime photochemistry in the formation of 2N-OOMMT. The 2N-OOMAro species were of the highest oxygenation level, followed by 2N-OOMMT and 2NOOM(Ali), which were affected by photochemistry and NOx concentrations. These results highlight the significant formation of 2N-OOMs and the influencing factors on their formation in polluted urban environments, where various volatile organic compound (VOC) precursors and atmospheric oxidants are present.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000948380600001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273212
作者单位	Shanghai Jiao Tong University; Centre National de la Recherche Scientifique (CNRS); UDICE-French Research Universities; Universite Claude Bernard Lyon 1; Fudan University; Nanjing University of Information Science & Technology
推荐引用方式 GB/T 7714	Lu, Yiqun,Ma, Yingge,Huang, Dan Dan,et al. Unambiguous identification of N-containing oxygenated organic moleculesusing a chemical-ionization Orbitrap (CI-Orbitrap) in an eastern Chinese megacity[J],2023,23(5):13.
APA	Lu, Yiqun.,Ma, Yingge.,Huang, Dan Dan.,Lou, Shengrong.,Jing, Sheng'ao.,...&Huang, Cheng.(2023).Unambiguous identification of N-containing oxygenated organic moleculesusing a chemical-ionization Orbitrap (CI-Orbitrap) in an eastern Chinese megacity.ATMOSPHERIC CHEMISTRY AND PHYSICS,23(5),13.
MLA	Lu, Yiqun,et al."Unambiguous identification of N-containing oxygenated organic moleculesusing a chemical-ionization Orbitrap (CI-Orbitrap) in an eastern Chinese megacity".ATMOSPHERIC CHEMISTRY AND PHYSICS 23.5(2023):13.