Determining the cutoff diameter and counting efficiency of optical particle counters with an aerodynamic aerosol classifier and an inkjet aerosol generator
| Autor: | Hiromu Sakurai, Yoshiko Murashima, Jason S. Olfert, Kenjiro Iida, Kumiko Yashiro, Steven Tran |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
010504 meteorology & atmospheric sciences business.industry Counting efficiency Aerodynamics 010501 environmental sciences 01 natural sciences Pollution Aerosol Optics Aerosol generator Environmental Chemistry Cutoff General Materials Science business Classifier (UML) Physics::Atmospheric and Oceanic Physics 0105 earth and related environmental sciences |
| Zdroj: | Aerosol Science and Technology. 54:1335-1344 |
| ISSN: | 1521-7388 0278-6826 |
| DOI: | 10.1080/02786826.2020.1777252 |
| Popis: | A method to determine the cutoff diameter and counting efficiency of single-particle optical particle counters (OPC) is presented. An aerodynamic aerosol classifier (AAC) coupled with an atomizer was used to generate monodisperse dioctyl phthalate particles with a condensation particle counter (CPC) as the reference instrument. This method is accurate for capturing the counting efficiency of OPCs at lower size ranges and determining the cutoff diameter. The CPC was found to be a poor reference instrument for particles larger than 1 µm in which case an inkjet aerosol generator (IAG) was used as the monodisperse particle source and reference instrument. Two different particle materials were used with the IAG: lactose monohydrate and an ionic liquid (1-ethyl-3-methylimidazolium trifluoromethanesulfonate). A combination of the AAC to size smaller particles ( µm) and IAG to generate larger particles (>1 µm) was found to provide a comprehensive method capable of covering the counting efficiency over the entire operating range of OPCs. Copyright © 2020 American Association for Aerosol Research |
| Databáze: | OpenAIRE |
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