DMA中和器内でのSO_2粒子化に与えるO_3の影響 [in Japanese] Effect of O_3 on Particle Formation from SO_2 in DMA's Neutralizer [in Japanese]
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Particle formation by radiolysis was observed in the neutralizer of the differential mobility analyzer (DMA) in air or N<SUB>2</SUB> under presence of O<SUB>3</SUB> and/or SO<SUB>2</SUB>. The effects of SO<SUB>2</SUB> concentration, relative humidity and O<SUB>3</SUB> concentration on the particle formation in the neutralizer were investigated. This particle formation may cause artifacts in aerosol size-measuring using a DMA. The particle number concentration increased with increasing of SO<SUB>2</SUB> concentration and relative humidity. In low humidity condition, remarkable increase of the number concentration was observed when 0.1 ppm of O<SUB>3</SUB> was added to SO<SUB>2</SUB> (0.2 ppm)/N<SUB>2</SUB> (H<SUB>2</SUB>O < 15 ppm) mixture. The mechanisms of the particle formation in the neutralizer under presence of O<SUB>3</SUB> were discussed.
- Earozoru Kenkyu
Earozoru Kenkyu 12(2), 130-134, 1997-06-20
Japan Association of Aerosol Science and Technology