Journal article
Gas-Particle Distribution of D 5 Oxidation Products in New York City during Summertime
ACS ES&T air, Vol.2(11), pp.2517-2526
11/14/2025
DOI: 10.1021/acsestair.5c00193
Appears in UI Libraries Support Open Access
Abstract
Personal care products can release decamethylcyclopentasiloxane (D5) to the atmosphere, where it oxidizes to form 1-hydroxynonamethylcyclopentasiloxane (D4TOH). This oxidation product subsequently can partition to the particle-phase to form secondary organic aerosol (SOA). The gas-particle distribution of D4TOH has been studied in the laboratory but has yet to be established in ambient air. This study examines the gas-particle distribution of D4TOH and related oxidation products in New York City during the summertime of 2022 using medium volume air samplers, solvent extraction, and gas and liquid chromatography mass spectrometry methods. Positive sampling artifacts constituted the majority of D4TOH observed on quartz fiber filters (54–100%, averaging 86%, n = 12), indicating the high potential for particle-phase D4TOH to be overestimated. After artifact correction, D4TOH was observed in fine particles in 5 of the 12 sampling periods, with its particle-phase fraction averaging 13%. Because D4TOH is predominantly in the gas phase, it makes a minor contribution to D5-derived SOA during summertime. Further oxidation products of D5, including di, and tetrasiloxanols are predominantly in the particle-phase (>77%, n = 4) during summertime and have relatively small positive artifacts. These polysiloxanols provide evidence of D5-derived SOA in the urban aerosols and are more suitable tracers for D5-derived SOA than D4TOH in summertime because of their higher particle-phase fractions.
Details
- Title: Subtitle
- Gas-Particle Distribution of D 5 Oxidation Products in New York City during Summertime
- Creators
- Josie K. Welker - University of IowaJeewani N. Meepage - University of IowaCharles O. Stanier - University of IowaElizabeth A. Stone - University of Iowa, Chemistry
- Resource Type
- Journal article
- Publication Details
- ACS ES&T air, Vol.2(11), pp.2517-2526
- DOI
- 10.1021/acsestair.5c00193
- ISSN
- 2837-1402
- eISSN
- 2837-1402
- Publisher
- American Chemical Society
- Language
- English
- Electronic publication date
- 10/15/2025
- Date published
- 11/14/2025
- Academic Unit
- Chemistry; Chemical and Biochemical Engineering
- Record Identifier
- 9985017451302771
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