Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 829-838 |
| Journal | Journal of Aerosol Science |
| Volume | 20 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 1989 |
| MoE publication type | A1 Journal article-refereed |
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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 journal › Article › Scientific › peer-review
TY - JOUR
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.
PY - 1989
Y1 - 1989
N2 - 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.
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.
U2 - 10.1016/0021-8502(89)90093-1
DO - 10.1016/0021-8502(89)90093-1
M3 - Article
VL - 20
SP - 829
EP - 838
JO - Journal of Aerosol Science
JF - Journal of Aerosol Science
SN - 0021-8502
IS - 7
ER -