Detection and quantification of 2-methyltetrols in ambient aerosol in the southeastern United States |
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| Institution: | 1. Department of Environmental Engineering, School of Resource and Environmental Sciences, Wuhan University, Wuhan 430079, China;2. State Key Laboratory for Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China;3. State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;1. Johannes Gutenberg-University Mainz, Institute for Inorganic and Analytical Chemistry, Duesbergweg 10-14, 55128 Mainz, Germany;2. Johannes Gutenberg-University Mainz, Institute for Organic Chemistry, Duesbergweg 10-14, 55128 Mainz, Germany;3. Atmospheric Chemistry Department, Max-Planck Institute for Chemistry, 55020 Mainz, Germany;1. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi''an 710075, China;2. School of Human Settlements and Civil Engineering, Xi''an Jiaotong University, Xi''an 710049, China;1. Institute of Low Temperature Science, Hokkaido University, Sapporo, Japan;2. Graduate School of Environmental Science, Hokkaido University, Sapporo, Japan;3. LAPC, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China;1. School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China;2. College of Environmental Science and Engineering, Peking University, Beijing 100871, China;3. Shanghai Academy of Environmental Sciences, Shanghai 200233, China |
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| Abstract: | Filters collected from the Southeastern Aerosol Research and Characterization (SEARCH) air monitoring network were analyzed for the presence of 2-methyltetrols, namely 2-methylthreitol and 2-methylerythritol, two compounds that are products of the photooxidation of isoprene and have been detected in aerosol at a variety of sites around the globe. The 2-methytetrols were detected in ambient filter samples collected at the four SEARCH sites, Birmingham, AL, Centreville, AL, Pensacola, FL, and at Jefferson Street in Atlanta, GA, in late June 2004. Average atmospheric concentrations of 11.9 and 4.8 ng m?3 were measured for 2-methylerythritol and 2-methylthreitol, respectively, at the inland sampling sites, whereas average concentrations of 4.9 and 1.6 ng m?3 were measured at the coastal sampling location (Pensacola). On average, the aerosol loading from these two compounds accounts for approximately 0.42% and 0.21% of the organic mass collected on a given sampling day at the inland and coastal sites, respectively. The present data on these compounds, which are particulate-phase fingerprints of isoprene photooxidation, add to the growing body of ambient data on secondary organic aerosol from isoprene. |
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