| Title: | Occurrence and Gas-Particle Partitioning of Organic UV-Filters in Urban Air |
| Author(s): | Pegoraro CN; Harner T; Su K; Ahrens L; |
| Address: | "Departamento de Quimica, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata (CONICET), Funes 3350, B7602AYL Mar del Plata, Argentina. Air Quality Processes Research Section, Environment and Climate Change Canada, 4905 Dufferin Street, Toronto, Ontario M3H 5T4, Canada. Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences (SLU), Box 7050, SE-75007 Uppsala, Sweden" |
| ISSN/ISBN: | 1520-5851 (Electronic) 0013-936X (Linking) |
| Abstract: | "A retrospective analysis of a comprehensive series of high-volume air samples (n = 70) collected during 2010-2011 in Toronto (Canada) was performed. Seven UV compounds were analyzed by gas chromatography-tandem mass spectrometry (GC-MS/MS) with sum of concentrations (gas + particle phase) ranging from 80 to 2030 pg/m(3). Homosalate (HMS) was the most prevalent organic UV-filter in air (47% of the total concentration), followed by 2-ethylhexyl salicylate (EHS, approximately 29%), E- and Z-2-ethylhexyl 4-methoxycinnamate (EHMC, approximately 17%). Ambient air (gas + particle phase) concentrations of organic UV-filters showed a strong seasonality, with peak levels during the summer. An analysis of Clausius-Clapeyron slopes indicated that much of the ambient burden of organic UV-filters are explained by volatilization from terrestrial and aquatic surfaces and supplemented with human activities and use of lotions and sunscreens, containing organic UV-filters, in addition to its use in plastics, textiles, paints, and pesticides. The results showed that organic UV-filters exist mainly in the gas phase with some exceptions, for instance, octocrylene (OCR), which was associated with both gas and particle phases, and avobenzone (AVB), which was predominantly in the particle phase. Lastly, this study revealed the need for basic physical chemical property data for organic UV-filters, including information on transformation rates and products, for better evaluating their environmental fate and effects" |
| Keywords: | Canada Gas Chromatography-Mass Spectrometry Humans Retrospective Studies *Sunscreening Agents/analysis *Tandem Mass Spectrometry; |
| Notes: | "MedlinePegoraro, Cesar N Harner, Tom Su, Ky Ahrens, Lutz eng Research Support, Non-U.S. Gov't 2020/09/15 Environ Sci Technol. 2020 Oct 20; 54(20):12881-12889. doi: 10.1021/acs.est.0c02665. Epub 2020 Sep 28" |
