Development and Performance Evaluation of Air Sampler with Inertial Filter for Nanoparticle Sampling

Masami Furuuchi ； Kazunobu Eryu ； Mizuki Nagura ； Mitsuhiko Hata ； Takaharu Kato ； Naoko Tajima ； Kazuhiko Sekiguchi ； Kensei Ehara ； Takafumi Seto ； Yoshio Otani

《Aerosol and Air Quality Research》 10卷2期 (2010/04) Pp. 185-192

並列摘要

This paper describes the design and evaluation of an ambient air sampler consisting of a four-stage impactor and an inertial filter, for collecting various size fractions, including nano-particles, in a short sampling period. Impactor stages of PM10/PM2.5/PM1/PM0.5 were successfully devised with a reasonable accuracy in terms of cutoff size and slope of the collection efficiency curves. The designed inertial filter had an aerodynamic cutoff size of d(subscript p50)~65 nm with a satisfactory sharpness in classification. The total pressure drop of the sampler (hereinafter referred to as a ”Nanosampler”) was ~30 kPa at a flow rate of 40 L/min. The developed Nanosampler has advantages over currently available samplers such as LPI and nano-MOUDI, in terms of portability and loss of semi-volatile components in ultrafine particles by evaporation at a reduced pressure. Furthermore, the size distributions of the ambient particles measured with the Nanosampler compared favorably with those measured by the conventional instruments that are currently available on the market.

並列關鍵字

Nano-particles ； Inertial filter ； Impactor ； Pressure drop