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《Environmental Chemistry》 1992-01
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SIMULTANEOUS COLLECTION AND MEASUREMENT OF GASES AND THEIR ASSOCIATED PARTICULATES USING A DIFFUSION DENUDER WITH A FILTER PACK

Li Yuanqian(West China University of Medical Sciences, Chengdu, 610041)Harrison R M(Institute of Aerosol Science, University of Essex, U. K.)  
A sampling method employing an annular diffusion denuder with a filter pack was established for the simultaneous collection of NH3, HNO3, HC1, SO2 and their associated aerosols. The denuder apparatus consisted of two annular diffusion denu ders in series. The first denuder was coated with a solution of 1% Na2CO3 in 1:1 methanol/water for collecting gaseous HCl, HNO3 and SO2, and the second denuder with a solution of 5% H3PO3 in methanol for gaseous NH3. Air was drawn through the denuders and subsequently through a PTFE filter pack comprising a Teflon filter for collecting suspended particulates and a Nylon filter for the evaporated HNO3 and HC1 front the Teflon filter. The collected samples were analyzed by ion chro-matography for Cl-, NO3 and SO42-. At the flow rate of 10 L/min sampling for 24h, the detection limits of gaseous HC1, HNO3 and SO2 were in the range of 0.04-0.09 μg/m3, and that of NH3 was 0.12μg/m3. The compact set up offers the feasible approach for collecting ambient and indoor air without the need of expensive equipment.
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【Co-citations】
Chinese Journal Full-text Database 10 Hits
1 Li Yuanqian, Mu Wenxuan (West China University of Medical Sciences, Chendu 610041 ) Wang Li (The Health and Anti-Epidemic Station of Luohu Distric, Shenzhen);A Sampling Method for Ammonia and Ammonium Particulate in Air With an Annular Diffusion Denuder and a Filter Pack[J];Chinese Journal of Analytieal Chemistry;1997-02
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