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Design and calibration of a multi-channel aerosol sampler for tropopause region studies from the CARIBIC platform

Nguyen Ngoc, Hung LU ; Gudmundsson, Anders LU and Martinsson, Bengt LU (2006) In Aerosol Science and Technology 40(8). p.649-655
Abstract
An aircraft-based, multi-channel aerosol sampler for studies of the upper troposphere and lowermost stratosphere from the CARIBIC ( Civil Aircraft for Regular Investigation of the Atmosphere Based on an Instrument Container) platform was designed and calibrated. The sampler operates with an impaction technique at a flow rate of 10.4 lpm and consists of sixteen sampling channels. Samples are collected in a time sequence. Each channel contains two sample types that are used for quantitative measurement of concentrations, using particle-induced X-ray emission ( PIXE), and single particle analysis with electron microscopy. The minimum detection limits for PIXE analysis after 1.5 h sampling are, for example, 2.0, 0.14, and 0.02 ng/m(3) STP (... (More)
An aircraft-based, multi-channel aerosol sampler for studies of the upper troposphere and lowermost stratosphere from the CARIBIC ( Civil Aircraft for Regular Investigation of the Atmosphere Based on an Instrument Container) platform was designed and calibrated. The sampler operates with an impaction technique at a flow rate of 10.4 lpm and consists of sixteen sampling channels. Samples are collected in a time sequence. Each channel contains two sample types that are used for quantitative measurement of concentrations, using particle-induced X-ray emission ( PIXE), and single particle analysis with electron microscopy. The minimum detection limits for PIXE analysis after 1.5 h sampling are, for example, 2.0, 0.14, and 0.02 ng/m(3) STP ( standard temperature and pressure) for sulfur, potassium, and nickel. Calibration included penetration studies of a cyclone arrangement used to define the upper size limit in the sampling to 2.0 mu m diameter and the collection efficiency of the impactor. Both components of the sampling system showed penetration and collection efficiency close to 100%, respectively, in the particle size range of interest. The impactor cut-off was found to be dependent on the ratio of the impactor upstream-to-downstream pressure for ratios well below the critical pressure drop (i.e., the pressure where the jet reaches sonic velocity) being 0.15 mu m and 0.08 mu m for ratios 0.41 and 0.2. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Aerosol Science and Technology
volume
40
issue
8
pages
649 - 655
publisher
Taylor & Francis
external identifiers
  • wos:000238413100008
  • scopus:33745329308
ISSN
1521-7388
DOI
10.1080/02786820600767807
language
English
LU publication?
yes
id
39c9e4ff-0ccc-4a8d-94ec-e4eba8f162ad (old id 406362)
date added to LUP
2007-10-11 09:57:14
date last changed
2019-11-10 03:30:42
@article{39c9e4ff-0ccc-4a8d-94ec-e4eba8f162ad,
  abstract     = {An aircraft-based, multi-channel aerosol sampler for studies of the upper troposphere and lowermost stratosphere from the CARIBIC ( Civil Aircraft for Regular Investigation of the Atmosphere Based on an Instrument Container) platform was designed and calibrated. The sampler operates with an impaction technique at a flow rate of 10.4 lpm and consists of sixteen sampling channels. Samples are collected in a time sequence. Each channel contains two sample types that are used for quantitative measurement of concentrations, using particle-induced X-ray emission ( PIXE), and single particle analysis with electron microscopy. The minimum detection limits for PIXE analysis after 1.5 h sampling are, for example, 2.0, 0.14, and 0.02 ng/m(3) STP ( standard temperature and pressure) for sulfur, potassium, and nickel. Calibration included penetration studies of a cyclone arrangement used to define the upper size limit in the sampling to 2.0 mu m diameter and the collection efficiency of the impactor. Both components of the sampling system showed penetration and collection efficiency close to 100%, respectively, in the particle size range of interest. The impactor cut-off was found to be dependent on the ratio of the impactor upstream-to-downstream pressure for ratios well below the critical pressure drop (i.e., the pressure where the jet reaches sonic velocity) being 0.15 mu m and 0.08 mu m for ratios 0.41 and 0.2.},
  author       = {Nguyen Ngoc, Hung and Gudmundsson, Anders and Martinsson, Bengt},
  issn         = {1521-7388},
  language     = {eng},
  number       = {8},
  pages        = {649--655},
  publisher    = {Taylor & Francis},
  series       = {Aerosol Science and Technology},
  title        = {Design and calibration of a multi-channel aerosol sampler for tropopause region studies from the CARIBIC platform},
  url          = {http://dx.doi.org/10.1080/02786820600767807},
  volume       = {40},
  year         = {2006},
}