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Evaluation of particle growth systems for sampling and analysis of atmospheric fine particles 被引量:3
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作者 Dae Seong Kim Sang Bum Hong +1 位作者 Jung-Taek Kwon Kihong Park 《Particuology》 SCIE EI CAS CSCD 2011年第6期606-610,共5页
Three types of water-based condensational growth systems, which can enable particles to grow in size to facilitate sampling and subsequent chemical analysis, were evaluated. The first one is a mixing type growth syste... Three types of water-based condensational growth systems, which can enable particles to grow in size to facilitate sampling and subsequent chemical analysis, were evaluated. The first one is a mixing type growth system where aerosols are mixed with saturated water vapor, the second one is a thermal diffusive growth system where warm flow enters cold-walled tube, and the third one is a laminar flow type where cold flow enters a warm wet-wall tube. Hygroscopic sodium chloride (NaCl), ammonium sulfate ((NH4)2SO4) and ammonium nitrate (NH4N03), and non-hygroscopic polystyrene latex (PSL) particles, in the size range of 50-400 nm, were used to determine their growth factors through the growth systems. Our data showed that the third-type growth system could enable particles to grow most efficiently regardless of their hygroscopic property. Collection efficiency of particles in the size range of 0.05-2.5 μm, in a continuous aerosol sampler after they passed through the third-type growth system was about 100%, suggesting that the third-type growth system would he the most useful among the tested growth systems for sampling and subsequent chemical analysis of fine and ultrafine particles. 展开更多
关键词 particle growth chamber Condensational growth particle sampler Hygroscopic particles
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