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Relative humidity non-uniformities in Hygroscopic Tandem Differential Mobility Analyzer measurements. / Bezantakos, S.; Huang, L.; Barmpounis, K.; Martin, S. T.; Biskos, G.

In: Journal of Aerosol Science, Vol. 101, 01.11.2016, p. 1-9.

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Bezantakos, S. ; Huang, L. ; Barmpounis, K. ; Martin, S. T. ; Biskos, G. / Relative humidity non-uniformities in Hygroscopic Tandem Differential Mobility Analyzer measurements. In: Journal of Aerosol Science. 2016 ; Vol. 101. pp. 1-9.

BibTeX

@article{1d68f155acbb4eac8c7a1b8b28969629,
title = "Relative humidity non-uniformities in Hygroscopic Tandem Differential Mobility Analyzer measurements",
abstract = "Hygroscopic Tandem Differential Mobility Analyzers (HTDMAs) are widely used to measure the water uptake characteristics of aerosol particles. As has been shown experimentally in the past, potential differences in the relative humidity (RH) between the aerosol and the sheath flow of the second Differential Mobility Analyzer (DMA) can lead to erroneous estimates of the apparent hygroscopic behavior of the sampled particles. A prompt phase transition, for example, may become smeared and be erroneously interpreted as non-prompt. Using a particle-tracking model, here we simulate the trajectories and the state of the particles classified in a DMA with non-uniform RH and temperature profiles. Our simulations corroborate earlier observations proving that such an experimental artifact can induce particle growth within the second DMA. Given the importance of maintaining uniform RH and temperature inside the second DMA of HTDMA systems and the limitations of existing RH and temperature sensors, we further provide suggestions for their operation.",
keywords = "Aerosol Particle Hygroscopicity, HTDMA, Particle Τracking Μodel",
author = "S. Bezantakos and L. Huang and K. Barmpounis and Martin, {S. T.} and G. Biskos",
year = "2016",
month = "11",
day = "1",
doi = "10.1016/j.jaerosci.2016.07.004",
language = "English",
volume = "101",
pages = "1--9",
journal = "Journal of Aerosol Science",
issn = "0021-8502",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Relative humidity non-uniformities in Hygroscopic Tandem Differential Mobility Analyzer measurements

AU - Bezantakos, S.

AU - Huang, L.

AU - Barmpounis, K.

AU - Martin, S. T.

AU - Biskos, G.

PY - 2016/11/1

Y1 - 2016/11/1

N2 - Hygroscopic Tandem Differential Mobility Analyzers (HTDMAs) are widely used to measure the water uptake characteristics of aerosol particles. As has been shown experimentally in the past, potential differences in the relative humidity (RH) between the aerosol and the sheath flow of the second Differential Mobility Analyzer (DMA) can lead to erroneous estimates of the apparent hygroscopic behavior of the sampled particles. A prompt phase transition, for example, may become smeared and be erroneously interpreted as non-prompt. Using a particle-tracking model, here we simulate the trajectories and the state of the particles classified in a DMA with non-uniform RH and temperature profiles. Our simulations corroborate earlier observations proving that such an experimental artifact can induce particle growth within the second DMA. Given the importance of maintaining uniform RH and temperature inside the second DMA of HTDMA systems and the limitations of existing RH and temperature sensors, we further provide suggestions for their operation.

AB - Hygroscopic Tandem Differential Mobility Analyzers (HTDMAs) are widely used to measure the water uptake characteristics of aerosol particles. As has been shown experimentally in the past, potential differences in the relative humidity (RH) between the aerosol and the sheath flow of the second Differential Mobility Analyzer (DMA) can lead to erroneous estimates of the apparent hygroscopic behavior of the sampled particles. A prompt phase transition, for example, may become smeared and be erroneously interpreted as non-prompt. Using a particle-tracking model, here we simulate the trajectories and the state of the particles classified in a DMA with non-uniform RH and temperature profiles. Our simulations corroborate earlier observations proving that such an experimental artifact can induce particle growth within the second DMA. Given the importance of maintaining uniform RH and temperature inside the second DMA of HTDMA systems and the limitations of existing RH and temperature sensors, we further provide suggestions for their operation.

KW - Aerosol Particle Hygroscopicity

KW - HTDMA

KW - Particle Τracking Μodel

UR - http://www.scopus.com/inward/record.url?scp=84979243358&partnerID=8YFLogxK

U2 - 10.1016/j.jaerosci.2016.07.004

DO - 10.1016/j.jaerosci.2016.07.004

M3 - Article

VL - 101

SP - 1

EP - 9

JO - Journal of Aerosol Science

T2 - Journal of Aerosol Science

JF - Journal of Aerosol Science

SN - 0021-8502

ER -

ID: 7194259