Journal article
Advances in the Separation and Detection of Secondary Organic Aerosol Produced by Decamethylcyclopentasiloxane (D5) in Laboratory-Generated and Ambient Aerosol
ACS ES&T Air, Vol.1(5), pp.365-375
05/10/2024
DOI: 10.1021/acsestair.3c00073
PMCID: PMC11091883
PMID: 38751609
Appears in UI Libraries Support Open Access
Abstract
Decamethylcyclopentasiloxane (D5), a common ingredient in many personal care products (PCPs), undergoes oxidation in the atmosphere, leading to the formation of secondary organic aerosol (SOA). Yet, the specific contributions of D5-derived SOA on ambient fine particulate matter (PM2.5) have not been characterized. This study addresses this knowledge gap by introducing a new analytical method to advance the molecular characterization of oxidized D5 and its detection in ambient aerosol. The newly developed reversed phase liquid chromatography method, in conjunction with high-resolution mass spectrometry, separates and detects D5 oxidation products, enabling new insights into their molecular and isomeric composition. Application of this method to laboratory-generated SOA and urban PM2.5 in New York City expands the number of D5 oxidation products observed in ambient aerosol and informs a list of molecular candidates to track D5-derived SOA in the atmosphere. An oxidation series was observed in which one or more methyl groups in D5 (C10H30O5Si5) is replaced by a hydroxyl group, which indicates the presence of multistep oxidation products in ambient PM2.5. Because of their specificity to PCPs and demonstrated detectability in ambient PM2.5, several oxidation products are proposed as molecular tracers for D5-derived SOA and may prove useful in assessing the impact of PCPs-derived SOA in the atmosphere.
Details
- Title: Subtitle
- Advances in the Separation and Detection of Secondary Organic Aerosol Produced by Decamethylcyclopentasiloxane (D5) in Laboratory-Generated and Ambient Aerosol
- Creators
- Jeewani N. Meepage - University of IowaJosie K. Welker - University of IowaClaire M. Meyer - University of IowaSaeideh Mohammadi - University of IowaCharles O. Stanier - University of Iowa, Chemical and Biochemical EngineeringElizabeth A. Stone - University of Iowa, Chemistry
- Resource Type
- Journal article
- Publication Details
- ACS ES&T Air, Vol.1(5), pp.365-375
- Publisher
- American Chemical Society
- DOI
- 10.1021/acsestair.3c00073
- PMID
- 38751609
- PMCID
- PMC11091883
- ISSN
- 2837-1402
- eISSN
- 2837-1402
- Language
- English
- Date published
- 05/10/2024
- Academic Unit
- Chemistry; Chemical and Biochemical Engineering
- Record Identifier
- 9984656333502771
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