A static particle size selective bioaerosol sampler for the ambient atmosphere

Esko Kauppinen, A. Jäppinen, Risto Hillamo, A. Rautio-Lehtimäki, A. Koivikko

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

A static size-selective bioaerosol sampler for the ambient atmosphere was developed for studying the allergen carried by atmospheric aerosols smaller than intact pollen grains. The sampler consists of the University of Minnesota-type aerosol sampling inlet, a pre-impactor for water droplet and insect removal from the sample, a two-stage virtual impactor for the separation of intact pollen grains and selective sampling of fine and coarse ambient particles smaller than intact pollen grains, a condenser for vapour collection, and a flow control unit. The total flow rate of the sampler is 18.5 l min−1. Minor flow rate of both virtual impactor stages is 10% of the total flow through the corresponding stage. The virtual impactor was calibrated with solid ammonium fluorescein particles in the aerodynamic size range 1.7–14 μm. Aerodynamic cut diameters of the stages 1 and 2 of the virtual impactor were measured to be 7.2 and 2.4 μm, respectively. Maximum wall losses of stages 1 and 2 were 12 and 5%, respectively, occurring at the ‘cut-point’ particle sizes. When plotted as the function of the square root of the Stokes number, measured separation efficiencies collapsed on a single curve having √Stk50 = 0.60.
Original languageEnglish
Pages (from-to)829-838
JournalJournal of Aerosol Science
Volume20
Issue number7
DOIs
Publication statusPublished - 1989
MoE publication typeA1 Journal article-refereed

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sampler
Aerodynamics
Particle size
Flow rate
particle size
Allergens
Sampling
Atmospheric aerosols
atmosphere
Aerosols
Fluorescein
Ammonium Compounds
Flow control
pollen
Vapors
aerodynamics
Water
aerosol
flow control
sampling

Cite this

Kauppinen, E., Jäppinen, A., Hillamo, R., Rautio-Lehtimäki, A., & Koivikko, A. (1989). A static particle size selective bioaerosol sampler for the ambient atmosphere. Journal of Aerosol Science, 20(7), 829-838. https://doi.org/10.1016/0021-8502(89)90093-1
Kauppinen, Esko ; Jäppinen, A. ; Hillamo, Risto ; Rautio-Lehtimäki, A. ; Koivikko, A. / A static particle size selective bioaerosol sampler for the ambient atmosphere. In: Journal of Aerosol Science. 1989 ; Vol. 20, No. 7. pp. 829-838.
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abstract = "A static size-selective bioaerosol sampler for the ambient atmosphere was developed for studying the allergen carried by atmospheric aerosols smaller than intact pollen grains. The sampler consists of the University of Minnesota-type aerosol sampling inlet, a pre-impactor for water droplet and insect removal from the sample, a two-stage virtual impactor for the separation of intact pollen grains and selective sampling of fine and coarse ambient particles smaller than intact pollen grains, a condenser for vapour collection, and a flow control unit. The total flow rate of the sampler is 18.5 l min−1. Minor flow rate of both virtual impactor stages is 10{\%} of the total flow through the corresponding stage. The virtual impactor was calibrated with solid ammonium fluorescein particles in the aerodynamic size range 1.7–14 μm. Aerodynamic cut diameters of the stages 1 and 2 of the virtual impactor were measured to be 7.2 and 2.4 μm, respectively. Maximum wall losses of stages 1 and 2 were 12 and 5{\%}, respectively, occurring at the ‘cut-point’ particle sizes. When plotted as the function of the square root of the Stokes number, measured separation efficiencies collapsed on a single curve having √Stk50 = 0.60.",
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Kauppinen, E, Jäppinen, A, Hillamo, R, Rautio-Lehtimäki, A & Koivikko, A 1989, 'A static particle size selective bioaerosol sampler for the ambient atmosphere', Journal of Aerosol Science, vol. 20, no. 7, pp. 829-838. https://doi.org/10.1016/0021-8502(89)90093-1

A static particle size selective bioaerosol sampler for the ambient atmosphere. / Kauppinen, Esko; Jäppinen, A.; Hillamo, Risto; Rautio-Lehtimäki, A.; Koivikko, A.

In: Journal of Aerosol Science, Vol. 20, No. 7, 1989, p. 829-838.

Research output: Contribution to journalArticleScientificpeer-review

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T1 - A static particle size selective bioaerosol sampler for the ambient atmosphere

AU - Kauppinen, Esko

AU - Jäppinen, A.

AU - Hillamo, Risto

AU - Rautio-Lehtimäki, A.

AU - Koivikko, A.

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AB - A static size-selective bioaerosol sampler for the ambient atmosphere was developed for studying the allergen carried by atmospheric aerosols smaller than intact pollen grains. The sampler consists of the University of Minnesota-type aerosol sampling inlet, a pre-impactor for water droplet and insect removal from the sample, a two-stage virtual impactor for the separation of intact pollen grains and selective sampling of fine and coarse ambient particles smaller than intact pollen grains, a condenser for vapour collection, and a flow control unit. The total flow rate of the sampler is 18.5 l min−1. Minor flow rate of both virtual impactor stages is 10% of the total flow through the corresponding stage. The virtual impactor was calibrated with solid ammonium fluorescein particles in the aerodynamic size range 1.7–14 μm. Aerodynamic cut diameters of the stages 1 and 2 of the virtual impactor were measured to be 7.2 and 2.4 μm, respectively. Maximum wall losses of stages 1 and 2 were 12 and 5%, respectively, occurring at the ‘cut-point’ particle sizes. When plotted as the function of the square root of the Stokes number, measured separation efficiencies collapsed on a single curve having √Stk50 = 0.60.

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