Particle and Aerosol Research Vol. 11, No. 1, March 2015 |
ISSN : 1738-8716 (Print) ISSN : 2287-8130 (Online) |
Characteristics of PM10 Measured by Different Light-Scattering Instruments in Public Transport Vehicles
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Abstracts
Abstract
In this study, indoor PM10 concentration was measured by different type of real-time instruments in public transport
vehicles. Light-scattering method is widely used in measuring the size of particulate matters and there is two types of
light-scattering methods; one is the nephelometer type which measures the light-scattering degree by aerosol cloud, the
other is the spectrometer type which measures light-scattering degree by individual particle. We observed the variation
of PM10 in KTX, subway and express bus carriages by 1-minute resolution and found that there is similar tendency
in pattern among 4 light-scattering devices but difference in absolute concentrations. By comparing gravimetric result
in a subway cabin, the spectrometer type device, C, was chosen as a reference device. The conversion factors of
nephelometer device A-1, A-2, and B were 1.666, 1.463 and 2.125 respectively.
Keywords£ºPM10, Indoor aerosol, Light-scattering, Public Transportation, Conversion Factor
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