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http://dx.doi.org/10.5572/KOSAE.2008.24.4.404

Comparison of Ultrafine Particles Monitored at a Roadside Using an SMPS and a TR-DMPS  

Woo, Dae-Kwang (SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University)
Lee, Seung-Bok (Cener for Environmental Technology Research, Korea Institute of Science and Technology)
Bae, Gwi-Nam (Cener for Environmental Technology Research, Korea Institute of Science and Technology)
Kim, Tae-Sung (SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University)
Publication Information
Journal of Korean Society for Atmospheric Environment / v.24, no.4, 2008 , pp. 404-414 More about this Journal
Abstract
A Transient Differential Mobility Particle Spectrometer (TR-DMPS) with a short response time was recently developed to monitor high concentration of ultrafine particles emitted from vehicles. To investigate the availability of the TR-DMPS for monitoring transient roadside aerosols, the number size distribution of ultrafine particles was monitored at the Cheongnyangni roadside in Seoul on March 23, 2007 together with a Scanning Mobility Particle Sizer (SMPS). The roadside aerosols were monitored every 5 min and 0.1 sec by using the SMPS and the TR-DMPS, respectively. The concentration of ultrafine particles at the roadside was highly fluctuated for a short duration. From the comparison of particle number concentrations and size distributions between two instruments, it was confirmed that the SMPS provided fairly good time-averaged number size distribution although it did not follow rapid change of particle number concentration at the roadside. The TR-DMPS quickly responded to a rapid change of particle number concentration due to abrupt traffic flow. However, the TR-DMPS frequently showed electrical noise events, resulting in underestimated particle contamination. A more stable operation of the TR-DMPS is needed in application of roadside aerosol monitoring.
Keywords
SMPS; TR-DMPS; Ultrafine particle; Size distribution; Roadside;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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