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Yoon, YJ,Cheevers, S,Jennings, SG,O'Dowd, CD
Journal Of Aerosol Science
Performance of a venturi dilution chamber for sampling 3-20 nm particles
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aerosol dilution AEROSOLS SYSTEM
The transmission efficiency of a venturi mixing and dilution system was investigated with laboratory generated aerosol by comparison of two condensation particle counters (CPCs). The transmission efficiency exceeded 95% for particle sizes between 3 and 20nm. The use of the diluter system is demonstrated through comparison with total concentrations derived from a nano-scanning mobility particle sizer (nSMPS) applied to measuring a rapidly changing atmospheric nucleation mode. The study indicates that the diluted-CPC sampler can resolve rapidly changing, and more intense peaks in excess of 10(6) cm(-3), which are otherwise missing or under-sampled by the nSMPS. (c) 2004 Elsevier Ltd. All rights reserved.
DOI 10.1016/j.jaerosci.2004.10.004
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