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Detecting and Chara...
Detecting and Characterizing Particulate Organic Nitrates with an Aerodyne Long-ToF Aerosol Mass Spectrometer
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Graeffe, Frans (author)
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- Heikkinen, Liine, 1990- (author)
- Stockholms universitet,Institutionen för miljövetenskap,Bolincentret för klimatforskning (tills m KTH & SMHI),University of Helsinki, Finland
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Garmash, Olga (author)
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Äijälä, Mikko (author)
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Allan, James (author)
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Feron, Anaïs (author)
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Cirtog, Manuela (author)
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Petit, Jean-Eudes (author)
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Bonnaire, Nicolas (author)
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Lambe, Andrew (author)
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Favez, Olivier (author)
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Albinet, Alexandre (author)
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Williams, Leah R. (author)
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Ehn, Mikael (author)
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(creator_code:org_t)
- 2022-12-22
- 2023
- English.
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In: ACS Earth and Space Chemistry. - : American Chemical Society (ACS). - 2472-3452. ; 7:1, s. 230-242
- Related links:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Subject headings
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- Particulate organic nitrate (pON) can be a major part of secondary organic aerosol (SOA) and is commonly quantified by indirect means from aerosol mass spectrometer (AMS) data. However, pON quantification remains challenging. Here, we set out to quantify and characterize pON in the boreal forest, through direct field observations at Station for Measuring Ecosystem Atmosphere Relationships (SMEAR) II in Hyytiälä, Finland, and targeted single-precursor laboratory studies. We utilized a long time-of-flight AMS (LToF-AMS) for aerosol chemical characterization, with a particular focus to identify CxHyOzN+ (“CHON+”) fragments. We estimate that during springtime at SMEAR II, pON (including both the organic and nitrate part) accounts for ∼10% of the particle mass concentration (calculated by the NO+/NO2+ method) and originates mainly from the NO3 radical oxidation of biogenic volatile organic compounds. The majority of the background nitrate aerosol measured is organic. The CHON+ fragment analysis was largely unsuccessful at SMEAR II, mainly due to low concentrations of the few detected fragments. However, our findings may be useful at other sites as we identified 80 unique CHON+ fragments from the laboratory measurements of SOA formed from NO3 radical oxidation of three pON precursors (β-pinene, limonene, and guaiacol). Finally, we noted a significant effect on ion identification during the LToF-AMS high-resolution data processing, resulting in too many ions being fit, depending on whether tungsten ions (W+) were used in the peak width determination. Although this phenomenon may be instrument-specific, we encourage all (LTOF-) AMS users to investigate this effect on their instrument to reduce the possibility of incorrect identifications.
Subject headings
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
Keyword
- organo-nitrates
- AMS
- nitrate radicals
- quantification
- uncertainty
- SOA
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Graeffe, Frans
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Heikkinen, Liine ...
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Garmash, Olga
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Äijälä, Mikko
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Allan, James
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Feron, Anaïs
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show more...
-
Cirtog, Manuela
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Petit, Jean-Eude ...
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Bonnaire, Nicola ...
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Lambe, Andrew
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Favez, Olivier
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Albinet, Alexand ...
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Williams, Leah R ...
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Ehn, Mikael
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
- Articles in the publication
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ACS Earth and Sp ...
- By the university
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Stockholm University