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《Acta Scientiarum Naturalium Universitatis Pekinensis》 2007-06
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An On-Line Method of Measuring Gaseous Ammonia and Ammonium in Aerosol in Atmosphere

DONG Huabin ZENG Limin 1)(State Key Joint Laboratory of Environmental Simulation and Pollution Control,and College of Environmental Sciences and Engineering,Peking University,Beijing,100871  
An ammonium detection module was developed to measure the concentration of ammonia in gas phase and ammonium in aerosols.Connecting with gas aerosol collector(GAC)system,the module could perform online measurements.This paper introduced the configuration and the running procedure of the module and showed the result of condition experiments.The module was applied to the observation of air quality in Guangzhou and compared with PILS system.The correlation coefficient(R)between the module and PILS was 0.8207.If just night data was analyzed,the coefficient was 0.9703.Possiblely the measurement was interfered by temperature.The NH+_4 concentration in PM_ 2.5 which was measured by the module was 92% of that in PM_ 10 which is measured by PILS.It illustrated that ammonium was mainly in fine particles.
【Fund】: 国家重点基础研究发展计划(2002CB410801);; 国家“863”项目(2005AA649030和2006AA06A301)资助项目
【CateGory Index】: X831
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