Document Detail

Hydroxycarboxylic Acid-Derived Organosulfates: Synthesis, Stability and Quantification in Ambient Aerosol.
MedLine Citation:
PMID:  21682266     Owner:  NLM     Status:  Publisher    
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.
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:
Type:  JOURNAL ARTICLE     Date:  2011-6-17
Journal Detail:
Title:  Environmental science & technology     Volume:  -     ISSN:  1520-5851     ISO Abbreviation:  -     Publication Date:  2011 Jun 
Date Detail:
Created Date:  2011-6-20     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0213155     Medline TA:  Environ Sci Technol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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