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| Study on methane sulfonic acid particles in the marine atmosphere of Macao Island |
| ZHANG Bao-an1,2 *, QIAN Gong-wang3 |
| 1.College of Chemical Science, South China University of Technology, Guangzhou 510640, China；2.College of Environment Science and Engineering, South China University of Technology, Guangzhou 510640, China；3.State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640,China |
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Abstract The concentration and percentage, diameter, pH value, and general variational characteristics of methanesulfonic acid (MSA) particles collected from the marine atmosphere of Macao Island of China were studied using the thinfilm method for single particle detection. The concentration of MSA particle in the atmosphere was 6.7×10-11 ~24.5×10-11nmol/m3, the number were 9.3%~33.8%, the pH value 1.63~2.51, and the equivalent diameter 1.1294~1.4371µm. Therewas obvious seasonal and daily variations of these parameters. The concentration and number percentage of MSA particle
reached their maxima in summer; the equivalent diameter and acidity of MSA particle increased with the decreased of airtemperature and increasing of the relative humidity, attaining maximum and minimum respectively in spring. During theday, highest MSA particle concentration appeared in the afternoon and lowest in the morning.
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Received: 01 January 1900
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