Detection of a secondary organic aerosol tracer derived from personal care products

Alissia Milani; Ibrahim M Al-Naiema; Elizabeth A Stone

doi:10.1016/j.atmosenv.2020.118078

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Detection of a secondary organic aerosol tracer derived from personal care products

Journal article

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Peer reviewed

Detection of a secondary organic aerosol tracer derived from personal care products

Alissia Milani, Ibrahim M Al-Naiema and Elizabeth A Stone

Atmospheric environment (1994), Vol.246, p.118078

02/01/2021

DOI: 10.1016/j.atmosenv.2020.118078

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Abstract

Decamethylcyclopentasiloxane (D5) is frequently used in personal care products (PCPs). In the gas phase, D5 is oxidized to form 1-hydroxynonamethylcyclopentasiloxane (D4TOH), which can partition to the particle phase. Numerous studies have reported secondary organic aerosol (SOA) formation via hydroxyl (OH) radical-initiated oxidation of D5. It is expected that PCPs have a significant impact on SOA, but the extent has not yet been investigated. To date, no studies have reported the occurrence of PCP-derived SOA in ambient particulate matter. This study examined fine particulate matter (PM2.5) collected in Atlanta, GA and Houston, TX and determined D4TOH was present in 28 of 29 and 33 of 46 ambient PM2.5 samples, respectively. Gas chromatographic retention data in the form of the Kováts index is reported for the first time to aid others in identifying this compound in order to assess the impact of PCPs on SOA formation. The estimated concentration of D4TOH ranged from 16 to 185 pg m-3 in Atlanta and 19–206 pg m-3 in Houston. Synthetic musks were also detected in Atlanta and Houston PM2.5 samples, which is consistent with PCPs impacting urban air quality. Because of its specificity and demonstrated detectability, D4TOH may be useful as a tracer of PCP-derived secondary organic aerosol. [Display omitted]

Cyclic siloxane

Fine particulate matter

PM2.5

Secondary organic aerosol

Synthetic musk

Urban air quality

Details

Title: Subtitle: Detection of a secondary organic aerosol tracer derived from personal care products
Creators: Alissia Milani - Department of Chemistry, University of Iowa, Iowa City, IA, 52242, USA
Ibrahim M Al-Naiema - Department of Chemistry, University of Iowa, Iowa City, IA, 52242, USA
Elizabeth A Stone - Department of Chemistry, University of Iowa, Iowa City, IA, 52242, USA
Resource Type: Journal article
Publication Details: Atmospheric environment (1994), Vol.246, p.118078
DOI: 10.1016/j.atmosenv.2020.118078
ISSN: 1352-2310
eISSN: 1873-2844
Publisher: Elsevier Ltd
Grant note: DOI: 10.13039/100000001, name: National Science Foundation
Language: English
Date published: 02/01/2021
Academic Unit: Chemistry; Chemical and Biochemical Engineering
Record Identifier: 9984217454702771

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