| Hydroxycarboxylic Acid-Derived Organosulfates: Synthesis, Stability and Quantification in Ambient Aerosol. | |
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MedLine Citation:
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PMID: 21682266 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Organosulfates have been proposed as potential contributors to aerosol growth and have been detected in both chamber and atmospheric aerosol samples. We present a simple method for the synthesis of quantitative analytical standards of two small hydroxycarboxylic acid-derived organosulfates, glycolic and lactic acid sulfate. Additionally, we discuss the stability of hydroxycarboxylic acid-derived organosulfates and their previously proposed sulfate hemiacetal isomers in commonly used solvents for filter extraction. The hydroxycarboxylic acid-derived organosulfates were found to be stable under acidic conditions comparable to those found in ambient aerosol. Using synthesized standards, quantitative organosulfate concentrations were measured from ambient particulate matter (PM<sub>2.5</sub>) collected in urban locations in the United States, Mexico City, and Pakistan. Lactic acid sulfate and glycolic acid sulfate concentrations ranged from 0.4-3.8 ng/m<sup>3</sup> and 1.9-11.3 ng/m<sup>3</sup>, respectively. We propose that glycolic acid sulfate represents an important tracer for atmospheric processes that form organosulfates in ambient particulate matter. |
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Authors:
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Corey N Olson; Melissa Marie Galloway; Ge Yu; Curtis Hedman; Matthew R Lockett; Tehshik Peter Yoon; Elizabeth A Stone; Lloyd M Smith; Frank N Keutsch |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-6-17 |
Journal Detail:
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Title: Environmental science & technology Volume: - ISSN: 1520-5851 ISO Abbreviation: - Publication Date: 2011 Jun |
Date Detail:
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Created Date: 2011-6-20 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0213155 Medline TA: Environ Sci Technol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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