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Methods to measure and predict the transfer function size dependence of individual DMAs

Karlsson, Martin LU and Martinsson, Bengt LU (2003) In Journal of Aerosol Science 34(5). p.603-625
Abstract
In this study of the transfer function of copies of the Vienna-type differential mobility analyser (DMA) it was found that three, supposedly identical, DMAs exhibited distinct differences with respect to the width of the transfer function. This means that the transfer function of a DMA needs to be determined on an individual basis in order to obtain accurate results from DMA measurements. The size dependence of the transfer function width and the penetration of three DMAs were investigated experimentally in a broad range of Peclet numbers (400-400000). Two of the three DMAs exhibited transfer function widths in excess of the broadening induced by diffusion. The size dependence of the width of all three DMAs could be explained within a few... (More)
In this study of the transfer function of copies of the Vienna-type differential mobility analyser (DMA) it was found that three, supposedly identical, DMAs exhibited distinct differences with respect to the width of the transfer function. This means that the transfer function of a DMA needs to be determined on an individual basis in order to obtain accurate results from DMA measurements. The size dependence of the transfer function width and the penetration of three DMAs were investigated experimentally in a broad range of Peclet numbers (400-400000). Two of the three DMAs exhibited transfer function widths in excess of the broadening induced by diffusion. The size dependence of the width of all three DMAs could be explained within a few percents by assuming an instrument-specific, size-independent broadening in addition to diffusion broadening. The penetration was evaluated by relating to deposition in a circular tube. Excellent agreement between the experimental data and the simple model was obtained. The penetration study was extended to include literature data, showing that the simple model could be applied and that there are distinct differences between different DMA types. The results of this study indicate that the size dependence of the width of the transfer function and the penetration can be estimated by measuring the transfer function for a single particle size, thus greatly reducing the amount of work required by DMA users to characterise their instruments. (C) 2003 Elsevier Science Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
transfer function, size dependence prediction, DMA
in
Journal of Aerosol Science
volume
34
issue
5
pages
603 - 625
publisher
Elsevier
external identifiers
  • wos:000183025600006
  • scopus:1542715729
ISSN
0021-8502
DOI
10.1016/S0021-8502(03)00020-X
language
English
LU publication?
yes
id
cf55bb22-fa6f-4f25-936d-5e7f01e854fb (old id 310455)
date added to LUP
2007-09-16 06:54:32
date last changed
2018-06-03 04:21:03
@article{cf55bb22-fa6f-4f25-936d-5e7f01e854fb,
  abstract     = {In this study of the transfer function of copies of the Vienna-type differential mobility analyser (DMA) it was found that three, supposedly identical, DMAs exhibited distinct differences with respect to the width of the transfer function. This means that the transfer function of a DMA needs to be determined on an individual basis in order to obtain accurate results from DMA measurements. The size dependence of the transfer function width and the penetration of three DMAs were investigated experimentally in a broad range of Peclet numbers (400-400000). Two of the three DMAs exhibited transfer function widths in excess of the broadening induced by diffusion. The size dependence of the width of all three DMAs could be explained within a few percents by assuming an instrument-specific, size-independent broadening in addition to diffusion broadening. The penetration was evaluated by relating to deposition in a circular tube. Excellent agreement between the experimental data and the simple model was obtained. The penetration study was extended to include literature data, showing that the simple model could be applied and that there are distinct differences between different DMA types. The results of this study indicate that the size dependence of the width of the transfer function and the penetration can be estimated by measuring the transfer function for a single particle size, thus greatly reducing the amount of work required by DMA users to characterise their instruments. (C) 2003 Elsevier Science Ltd. All rights reserved.},
  author       = {Karlsson, Martin and Martinsson, Bengt},
  issn         = {0021-8502},
  keyword      = {transfer function,size dependence prediction,DMA},
  language     = {eng},
  number       = {5},
  pages        = {603--625},
  publisher    = {Elsevier},
  series       = {Journal of Aerosol Science},
  title        = {Methods to measure and predict the transfer function size dependence of individual DMAs},
  url          = {http://dx.doi.org/10.1016/S0021-8502(03)00020-X},
  volume       = {34},
  year         = {2003},
}