Particle Classification by the Tandem Differential Mobility Analyzer–Particle Mass Analyzer System
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 e...
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| Format: | Journal Article |
| Language: | English |
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2015
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| Online Access: | https://hdl.handle.net/10356/79327 http://hdl.handle.net/10220/38824 |
| _version_ | 1826129234189352960 |
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| author | Kuwata, Mikinori |
| author2 | Asian School of the Environment |
| author_facet | Asian School of the Environment Kuwata, Mikinori |
| author_sort | Kuwata, Mikinori |
| collection | NTU |
| description | 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. |
| first_indexed | 2024-10-01T07:37:18Z |
| format | Journal Article |
| id | ntu-10356/79327 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:37:18Z |
| publishDate | 2015 |
| record_format | dspace |
| spelling | ntu-10356/793272020-09-26T21:36:20Z Particle Classification by the Tandem Differential Mobility Analyzer–Particle Mass Analyzer System Kuwata, Mikinori Asian School of the Environment Earth Observatory of Singapore 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. Accepted version 2015-10-21T08:08:56Z 2019-12-06T13:22:39Z 2015-10-21T08:08:56Z 2019-12-06T13:22:39Z 2015 2015 Journal Article Kuwata, M. (2015). Particle Classification by the Tandem Differential Mobility Analyzer–Particle Mass Analyzer System. Aerosol Science and Technology, 49(7), 508-520. https://hdl.handle.net/10356/79327 http://hdl.handle.net/10220/38824 10.1080/02786826.2015.1045058 en Aerosol Science and Technology © 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: [http://dx.doi.org/10.1080/02786826.2015.1045058]. application/pdf application/pdf application/pdf |
| spellingShingle | Kuwata, Mikinori Particle Classification by the Tandem Differential Mobility Analyzer–Particle Mass Analyzer System |
| title | Particle Classification by the Tandem Differential Mobility Analyzer–Particle Mass Analyzer System |
| title_full | Particle Classification by the Tandem Differential Mobility Analyzer–Particle Mass Analyzer System |
| title_fullStr | Particle Classification by the Tandem Differential Mobility Analyzer–Particle Mass Analyzer System |
| title_full_unstemmed | Particle Classification by the Tandem Differential Mobility Analyzer–Particle Mass Analyzer System |
| title_short | Particle Classification by the Tandem Differential Mobility Analyzer–Particle Mass Analyzer System |
| title_sort | particle classification by the tandem differential mobility analyzer particle mass analyzer system |
| url | https://hdl.handle.net/10356/79327 http://hdl.handle.net/10220/38824 |
| work_keys_str_mv | AT kuwatamikinori particleclassificationbythetandemdifferentialmobilityanalyzerparticlemassanalyzersystem |