Molecular Characteristics of Dissolved Organic Nitrogen in PM2.5 from Shanghai by FT-ICR Mass Spectrometry DOI Creative Commons

Cuiping Ning,

Yutong Tang,

Dan Wang

et al.

E3S Web of Conferences, Journal Year: 2025, Volume and Issue: 625, P. 02004 - 02004

Published: Jan. 1, 2025

Dissolved organic nitrogen (DON) is a significant contributor to atmospheric nitrogen, and it can influence the global cycle. However, its composition sources remain largely unknown. We collected fine particulate matter (PM 2.5 ) in Shanghai analyzed molecular compositions of DON using Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). The results showed that 902 dissolved formulas were identified PM during summer Shanghai. weight ranged from 200 600 Da. compounds included CHON 1 2 , with having higher O/C ratio. was mainly composed lipid-like compounds, aliphatic/peptide-like carbohydrate-like their contributions being 37.3%, 35.9%, 11.2%, respectively. A total 95% had an O/N≥3, indicating these carried -ONO functional group might be organonitrate compounds. Source apportionment analysis revealed comprised semi-volatile oxidized aerosol, low volatile aerosol biomass burning aerosol.

Language: Английский

Molecular Characteristics of Dissolved Organic Nitrogen in PM2.5 from Shanghai by FT-ICR Mass Spectrometry DOI Creative Commons

Cuiping Ning,

Yutong Tang,

Dan Wang

et al.

E3S Web of Conferences, Journal Year: 2025, Volume and Issue: 625, P. 02004 - 02004

Published: Jan. 1, 2025

Dissolved organic nitrogen (DON) is a significant contributor to atmospheric nitrogen, and it can influence the global cycle. However, its composition sources remain largely unknown. We collected fine particulate matter (PM 2.5 ) in Shanghai analyzed molecular compositions of DON using Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). The results showed that 902 dissolved formulas were identified PM during summer Shanghai. weight ranged from 200 600 Da. compounds included CHON 1 2 , with having higher O/C ratio. was mainly composed lipid-like compounds, aliphatic/peptide-like carbohydrate-like their contributions being 37.3%, 35.9%, 11.2%, respectively. A total 95% had an O/N≥3, indicating these carried -ONO functional group might be organonitrate compounds. Source apportionment analysis revealed comprised semi-volatile oxidized aerosol, low volatile aerosol biomass burning aerosol.

Language: Английский

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