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Sizing Characterization of the Fast-Mobility Particle Sizer (FMPS) Against SMPS and HR-ToF-AMS

Lee, Berto P. and Li, Yong Jie and Flagan, Richard C. and Lo, Charles and Chan, Chak K. (2013) Sizing Characterization of the Fast-Mobility Particle Sizer (FMPS) Against SMPS and HR-ToF-AMS. Aerosol Science and Technology, 47 (9). pp. 1030-1037. ISSN 0278-6826. doi:10.1080/02786826.2013.810809. https://resolver.caltech.edu/CaltechAUTHORS:20131101-104351009

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Abstract

Particle size distributions are of profound interest in the study of ambient aerosols. Electrostatic classification using the Scanning Mobility Particle Sizer (SMPS) and more recently the Fast-Mobility Particle Sizer (FMPS) is the most commonly employed approach to establish particle size distributions for submicron particles in field and laboratory applications. The FMPS enables fast size distribution measurements on a timescale of seconds but has been speculated to underestimate particle size. Aerosol mass spectrometry has emerged as another well-accepted method for size-resolved compositional aerosol analysis with particle sizing being accomplished by flight time separation over a specified flight path under vacuum conditions. In this work, we characterized the particle sizing performance of an FMPS against simultaneous measurements with an Aerodyne Aerosol Mass Spectrometer (AMS) and an SMPS by sampling ambient particles, as well as polydisperse and monodisperse particles from aqueous inorganic salt solutions in the size range from 50 nm to 450 nm. The particle size measurements by AMS and SMPS produced similar results, while the FMPS significantly underestimated particle size by 40–50%. The discrepancy was observed in all studied ambient and laboratory-generated aerosols and appeared to be largely independent of the sampled species. The observations suggest that it is crucial to evaluate the sizing performance of the FMPS against other instruments to ensure an adequate accuracy of the particle size measurements. In this study, a simple postcorrection method for the FMPS measurements was applied, which was able to successfully reduce the initial underestimation.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1080/02786826.2013.810809 DOIArticle
http://www.tandfonline.com/doi/abs/10.1080/02786826.2013.810809#.UnPoh0Hn_CMPublisherArticle
ORCID:
AuthorORCID
Flagan, Richard C.0000-0001-5690-770X
Chan, Chak K.0000-0001-9687-8771
Additional Information:© 2013 American Association for Aerosol Research. Received 11 March 2013; accepted 25 May 2013. Accepted author version posted online: 09 Jun 2013; Published online: 26 Jun 2013. Funding support from the University Grants Committee of Hong Kong (Special Equipment Grant SEG-HKUST07), the Environment and Conservation Fund (ECF ECWW09EG04), and the Research Grants Council of Hong Kong (Hong Kong PhD Fellowship Scheme, for Berto P. Lee) is gratefully acknowledged.
Funders:
Funding AgencyGrant Number
Hong Kong University Grants CommitteeSEG-HKUST07
Environment and Conservation Fund (ECF)ECWW09EG04
Hong Kong Research Grant CouncilUNSPECIFIED
Issue or Number:9
DOI:10.1080/02786826.2013.810809
Record Number:CaltechAUTHORS:20131101-104351009
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20131101-104351009
Official Citation:Berto P. Lee , Yong Jie Li , Richard C. Flagan , Charles Lo & Chak K. Chan (2013) Sizing Characterization of the Fast-Mobility Particle Sizer (FMPS) Against SMPS and HR-ToF-AMS, Aerosol Science and Technology, 47:9, 1030-1037, DOI: 10.1080/02786826.2013.810809
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:42187
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:01 Nov 2013 17:57
Last Modified:10 Nov 2021 16:19

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