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《Technigues and Equipment For Enviro.poll.cont》 2002-11
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Rapid collection of fine particles in the atmosphere and on-line measurement of chemical composition

Liu Guangren Wang Yuesi Wen Tianxue Zhang Wen He Xinxing (State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, LAPC, Beijing 100083) R.J. Weber C.S. Kiang B. Chameides (School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Geogia 30332-0340 U.S.A)  
We present a new approach for rapid collection of fine particles and on-line measurement of chemical composition. The approach is based on fine particle collection instrument in which the droplets are formed and grow rapidly, then impinge onto a flat vertical glass plate by inertia and are collected in water solution containing LiF standard. The resulting liquid is conducted to a dual channel ion chromatograph (1C) or a total organic carbon analyzer (TOC) to on-line analyze its chemical composition. Only 12 minutes it takes to measure a sample by IC or TOC. The detection limit is from 0.05μg/m 3(NH + 4 ) to 0.20μg/m 3(SO 2- 4) for IC and 5×10 -5μg/m 3 for TOC. Measurement uncertainty is 3% or so for inorganic ion and TOC. Results obtained in observation show that the approach is rapid, simple, high-sensitive and it is a very useful tool for rapid measurement of atmospheric fine particles chemical composition.
【Fund】: ~~
【CateGory Index】: X513
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