Measurement of hydroxymethanesulfonate in atmospheric aerosols |
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| Institution: | 1. Frontier Science Center for Deep Ocean Multispheres and Earth System (FDOMES) and Physical Oceanography Laboratory, Ocean University of China, Qingdao, Shandong, China;2. College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao, Shandong, China;3. North China Sea Marine Forecasting Center of State Ocean Administration, Qingdao, Shandong, China;4. College of Environmental Science and Engineering, Ocean University of China, Qingdao, Shandong, China;5. Faculty of Environmental and Symbiotic Sciences, Prefectural University of Kumamoto, Kumamoto 862-8502, Japan;6. Environment Research Institute, Shandong University, Qingdao, Shandong, China;1. Key Lab of Geographic Information Science of the Ministry of Education, School of Geographic Sciences, East China Normal University, Shanghai 210062, China;2. Institute of Eco-Chongming, 3663 North Zhongshan Road, Shanghai 200062, China |
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| Abstract: | Hydroxymethanesulfonate (HMS), a product of the heterogeneous reaction between S(IV) and HCHO, was measured in atmospheric aerosol samples collected at two locations indicating it can exist outside of clouds. Sampling was performed through collection with filters and analysis using ion chromatography with a treatment step to distinguish between HMS and uncomplexed S(IV). Concentrations of HMS were found to range from below the detection limit to 6.5 ng m-3 for samples collected in central New Mexico in the summer and around 30 ng m-3 for two samples collected in Seattle, Washington in the spring. Higher concentrations were associated with greater occurrence of clouds, which is the presumed source of the HMS. In the samples collected in Seattle, about half of the HMS was found associated with fine particles. In the central New Mexico samples, molar ratios of HMS to sulfate in particulate matter were found to be less than 0.002 indicating that HMS was a minor contributor of aerosol sulfur under the conditions of the measurements. |
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