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Title: Particle Classification by the Tandem Differential Mobility Analyzer–Particle Mass Analyzer System
Authors: Kuwata, Mikinori
Issue Date: 2015
Source: Kuwata, M. (2015). Particle Classification by the Tandem Differential Mobility Analyzer–Particle Mass Analyzer System. Aerosol Science and Technology, 49(7), 508-520.
Series/Report no.: Aerosol Science and Technology
Abstract: Particle mass analyzers, such as the aerosol particle mass analyzer (APM) and the Couette centrifugal particle mass analyzer (CPMA), are frequently combined with a differential mobility analyzer (DMA) to measure particle mass mp and effective density ρeff distributions of particles with a specific electrical mobility diameter dm. Combinations of these instruments, which are referred to as the DMA–APM or DMA–CPMA system, are also used to quantify the mass-mobility exponent Dm of non-spherical particles as well as to eliminate multiple charged particles. This study investigates the transfer functions of these setups, focusing especially on the DMA–APM system. The transfer function of the DMA–APM system was derived by multiplying the transfer functions of DMA and APM. The APM transfer function can be calculated using either the uniform or parabolic flow models. The uniform flow model provides an analytical function, while the parabolic flow model is more accurate. The resulting DMA–APM transfer functions were plotted on log(mp)-log(dp) space. A theoretical analysis of the DMA–APM transfer function demonstrated that the resolution of the setup is maintained when the rotation speed ω of APM is scanned to measure distribution. In addition, an equation was derived to numerically calculate the minimum values of the APM resolution parameter λc for eliminating multiple charged particles.
DOI: 10.1080/02786826.2015.1045058
Schools: Asian School of the Environment 
Research Centres: Earth Observatory of Singapore 
Rights: © 2015 American Association for Aerosol Research. This is the author created version of a work that has been peer reviewed and accepted for publication in Aerosol Science and Technology, published by Taylor & Francis on behalf of American Association for Aerosol Research. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document.  The published version is available at: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EOS Journal Articles

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