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Title: Rapid measurement of sub-micrometer aerosol size distribution using a fast integrated mobility spectrometer

We present rapid measurement of submicron particle size distributions enables the characterization of aerosols with fast changing properties, and is often necessary for measurements onboard mobile platforms (e.g., research aircraft). Aerosol mobility size distribution is commonly measured by a scanning mobility particle sizer (SMPS), which relies on voltage scanning or stepping to classify particles of different sizes, and may take up to several minutes to obtain a complete size spectrum of aerosol particles. The recently developed fast integrated mobility spectrometer (FIMS) with enhanced dynamic size range classifies and detects particles from 10 to ~600 nm simultaneously, allowing submicron aerosol mobility size distributions to be captured at a time resolution of 1 second. In this study, we present a detailed data inversion routine for deriving aerosol size distribution from FIMS measurements. The inversion routine takes into consideration the FIMS transfer function, particle penetration efficiency in the FIMS, and multiple charging of aerosols. The accuracy of the FIMS measurement is demonstrated by comparing parallel FIMS and SMPS measurements of stable aerosols with a wide range of size spectrum shapes, including ambient aerosols and aerosols classified by a differential mobility analyzer (DMA). The FIMS and SMPS-derived size distributions show excellent agreements for allmore » aerosols tested. In addition, total number concentrations of ambient aerosols were integrated from 1 Hz FIMS size distributions, and compared with those directly measured by a condensation particle counter (CPC) operated in parallel. Finally, the integrated and measured total particle concentrations agree well within 5%.« less
Authors:
 [1] ;  [1] ;  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Environmental & Climate Sciences Department
Publication Date:
Report Number(s):
BNL-203441-2018-JAAM
Journal ID: ISSN 0021-8502
Grant/Contract Number:
SC0012704; SC0006312; SC0013103
Type:
Accepted Manuscript
Journal Name:
Journal of Aerosol Science
Additional Journal Information:
Journal Volume: 121; Journal ID: ISSN 0021-8502
Publisher:
Elsevier
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES
OSTI Identifier:
1430881

Wang, Yang, Pinterich, Tamara, and Wang, Jian. Rapid measurement of sub-micrometer aerosol size distribution using a fast integrated mobility spectrometer. United States: N. p., Web. doi:10.1016/j.jaerosci.2018.03.006.
Wang, Yang, Pinterich, Tamara, & Wang, Jian. Rapid measurement of sub-micrometer aerosol size distribution using a fast integrated mobility spectrometer. United States. doi:10.1016/j.jaerosci.2018.03.006.
Wang, Yang, Pinterich, Tamara, and Wang, Jian. 2018. "Rapid measurement of sub-micrometer aerosol size distribution using a fast integrated mobility spectrometer". United States. doi:10.1016/j.jaerosci.2018.03.006.
@article{osti_1430881,
title = {Rapid measurement of sub-micrometer aerosol size distribution using a fast integrated mobility spectrometer},
author = {Wang, Yang and Pinterich, Tamara and Wang, Jian},
abstractNote = {We present rapid measurement of submicron particle size distributions enables the characterization of aerosols with fast changing properties, and is often necessary for measurements onboard mobile platforms (e.g., research aircraft). Aerosol mobility size distribution is commonly measured by a scanning mobility particle sizer (SMPS), which relies on voltage scanning or stepping to classify particles of different sizes, and may take up to several minutes to obtain a complete size spectrum of aerosol particles. The recently developed fast integrated mobility spectrometer (FIMS) with enhanced dynamic size range classifies and detects particles from 10 to ~600 nm simultaneously, allowing submicron aerosol mobility size distributions to be captured at a time resolution of 1 second. In this study, we present a detailed data inversion routine for deriving aerosol size distribution from FIMS measurements. The inversion routine takes into consideration the FIMS transfer function, particle penetration efficiency in the FIMS, and multiple charging of aerosols. The accuracy of the FIMS measurement is demonstrated by comparing parallel FIMS and SMPS measurements of stable aerosols with a wide range of size spectrum shapes, including ambient aerosols and aerosols classified by a differential mobility analyzer (DMA). The FIMS and SMPS-derived size distributions show excellent agreements for all aerosols tested. In addition, total number concentrations of ambient aerosols were integrated from 1 Hz FIMS size distributions, and compared with those directly measured by a condensation particle counter (CPC) operated in parallel. Finally, the integrated and measured total particle concentrations agree well within 5%.},
doi = {10.1016/j.jaerosci.2018.03.006},
journal = {Journal of Aerosol Science},
number = ,
volume = 121,
place = {United States},
year = {2018},
month = {3}
}