Trends in the oxidation and relative volatility of chamber-generated secondary organic aerosol.
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| Title: | Trends in the oxidation and relative volatility of chamber-generated secondary organic aerosol. |
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| Authors: | Docherty, Kenneth S.1 docherty.kenneth@epa.gov, Corse, Eric W.1, Jaoui, Mohammed2, Offenberg, John H.2, Kleindienst, Tadeusz E.2, Krug, Jonathan D.2, Riedel, Theran P.2, Lewandowski, Michael2 |
| Source: | Aerosol Science & Technology. Sep2018, Vol. 52 Issue 9, p992-1004. 13p. |
| Subjects: | Time-of-flight mass spectrometers, Hydrocarbons, Aerosols, Toluene, Oxidation |
| Abstract: | The relationship between the oxidation state and relative volatility of secondary organic aerosol (SOA) from the oxidation of a wide range of hydrocarbons is investigated using a fast-stepping, scanning thermodenuder interfaced with a high-resolution time-of-flight aerosol mass spectrometer (AMS). SOA oxidation state varied widely across the investigated range of parent hydrocarbons but was relatively stable for replicate experiments using a single hydrocarbon precursor. On average, unit mass resolution indicators of SOA oxidation (e.g., AMS f43 and f44) are consistent with previously reported values. Linear regression of H:C vs. O:C obtained from parameterization of f43 and f44 and elemental analysis of high-resolution spectra in Van Krevelen space both yield a slope of ∼−0.5 across different SOA types. A similar slope was obtained for a distinct subset of toluene/NOx reactions in which the integrated oxidant exposure was varied to alter oxidation. The relative volatility of different SOA types displays similar variability and is strongly correlated with SOA oxidation state ( |
| Copyright of Aerosol Science & Technology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 131687853 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Trends in the oxidation and relative volatility of chamber-generated secondary organic aerosol. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Docherty%2C+Kenneth+S%2E%22">Docherty, Kenneth S.</searchLink><relatesTo>1</relatesTo><i> docherty.kenneth@epa.gov</i><br /><searchLink fieldCode="AR" term="%22Corse%2C+Eric+W%2E%22">Corse, Eric W.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Jaoui%2C+Mohammed%22">Jaoui, Mohammed</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Offenberg%2C+John+H%2E%22">Offenberg, John H.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Kleindienst%2C+Tadeusz+E%2E%22">Kleindienst, Tadeusz E.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Krug%2C+Jonathan+D%2E%22">Krug, Jonathan D.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Riedel%2C+Theran+P%2E%22">Riedel, Theran P.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Lewandowski%2C+Michael%22">Lewandowski, Michael</searchLink><relatesTo>2</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Aerosol+Science+%26+Technology%22">Aerosol Science & Technology</searchLink>. Sep2018, Vol. 52 Issue 9, p992-1004. 13p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Time-of-flight+mass+spectrometers%22">Time-of-flight mass spectrometers</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrocarbons%22">Hydrocarbons</searchLink><br /><searchLink fieldCode="DE" term="%22Aerosols%22">Aerosols</searchLink><br /><searchLink fieldCode="DE" term="%22Toluene%22">Toluene</searchLink><br /><searchLink fieldCode="DE" term="%22Oxidation%22">Oxidation</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The relationship between the oxidation state and relative volatility of secondary organic aerosol (SOA) from the oxidation of a wide range of hydrocarbons is investigated using a fast-stepping, scanning thermodenuder interfaced with a high-resolution time-of-flight aerosol mass spectrometer (AMS). SOA oxidation state varied widely across the investigated range of parent hydrocarbons but was relatively stable for replicate experiments using a single hydrocarbon precursor. On average, unit mass resolution indicators of SOA oxidation (e.g., AMS f43 and f44) are consistent with previously reported values. Linear regression of H:C vs. O:C obtained from parameterization of f43 and f44 and elemental analysis of high-resolution spectra in Van Krevelen space both yield a slope of ∼−0.5 across different SOA types. A similar slope was obtained for a distinct subset of toluene/NOx reactions in which the integrated oxidant exposure was varied to alter oxidation. The relative volatility of different SOA types displays similar variability and is strongly correlated with SOA oxidation state (<inline-graphic></inline-graphic>C). On average, relatively low oxidation and volatility were observed for aliphatic alkene (including terpenes) and n-alkane SOA while the opposite is true for mono- and polycyclic aromatic hydrocarbon SOA. Effective enthalpy for total chamber aerosol obtained from volatility differential mobility analysis is also highly correlated with <inline-graphic></inline-graphic>C indicating a primary role for oxidation levels in determining the volatility of chamber SOA. Effective enthalpies for chamber SOA are substantially lower than those of neat organic standards but are on the order of those obtained for partially oligomerized glyoxal and methyl glyoxal. © 2018 American Association for Aerosol Research [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Aerosol Science & Technology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1080/02786826.2018.1500014 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 13 StartPage: 992 Subjects: – SubjectFull: Time-of-flight mass spectrometers Type: general – SubjectFull: Hydrocarbons Type: general – SubjectFull: Aerosols Type: general – SubjectFull: Toluene Type: general – SubjectFull: Oxidation Type: general Titles: – TitleFull: Trends in the oxidation and relative volatility of chamber-generated secondary organic aerosol. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Docherty, Kenneth S. – PersonEntity: Name: NameFull: Corse, Eric W. – PersonEntity: Name: NameFull: Jaoui, Mohammed – PersonEntity: Name: NameFull: Offenberg, John H. – PersonEntity: Name: NameFull: Kleindienst, Tadeusz E. – PersonEntity: Name: NameFull: Krug, Jonathan D. – PersonEntity: Name: NameFull: Riedel, Theran P. – PersonEntity: Name: NameFull: Lewandowski, Michael IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 09 Text: Sep2018 Type: published Y: 2018 Identifiers: – Type: issn-print Value: 02786826 Numbering: – Type: volume Value: 52 – Type: issue Value: 9 Titles: – TitleFull: Aerosol Science & Technology Type: main |
| ResultId | 1 |
