[Study on the isolation method for the different states of atmospheric pollutant].
An annular denuder system(ADS), which consisted of denuder tubes striping the reactive gases from air and leaving the particles on the filters was designed. After sampling, the absorbed gases and particles were separately leached with water and determined by ion chromatography. The detection limit of samples was about 1.0 x 10(-4) mg/m3 for SO2, HNO2, SO4(2-) and NO3-. The loss of particles on the denuder faces was less than 5% and the collection effectiveness of particles was 100%. Absorbtion effectiveness for gases was more than 95%. The average RSD was less than 6.5%.
Wu
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Y
Institute of Environmental Heath Monitoring, Chinese Academy of Preventive Medicine, Beijing 100021, China.
D000393:Air Pollutants / Q000302:isolation & purification*; D002852:Chromatography, Ion Exchange; D010316:Particle Size
D000393:Air Pollutants