CGU-ACTJU sampler for analysis of water-soluble constituents of aerosols\n

0509453 - ÚIACH 2020 SE eng A - Abstract
Mikuška, Pavel - Čapka, Lukáš - Večeřa, Zbyněk
CGU-ACTJU sampler for analysis of water-soluble constituents of aerosols
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EAC -Online program. -: Nordic Society for Aerosol Research, 2019. P1-089. ISBN N.
[European Aerosol Conference EAC 2019. 25.08.2019-30.08.2019, Gothenburg]
R&D Projects: GA ČR(CZ) GA19-12109S; GA ČR(CZ) GA14-25558S
Institutional support: RVO:68081715
Keywords : continuous sampler * aerosols * water-soluble constituents of aerosols
OECD category: Analytical chemistry
https://eac2019.se/program/

Characterization of chemical composition of atmospheric aerosols is essential for understanding their role in various environmental issues and adverse health effects.
A new aerosol sampler based on the original version of Aerosol Counterflow Two-Jets Unit (ACTJU) was presented. The ACTJU collector, connected with a water-based Condensation Growth Unit (CGU) placed upstream of the ACTJU, accomplishes the quantitative collection of fine and ultrafine aerosol particles down to a few nanometers in diameter. Condensation of water vapor on particles during air passing through the CGU enlarges nanometer sized particles to larger sizes in the supermicrometer range and the formed droplets are then collected into water in the ACTJU collector. The collector effluent is permanently sucked out from the ACTJU for subsequent on-line analysis of particulate water-soluble species. The continuous collection of aerosols with the CGU-ACTJU sampler allows for the time-resolved measurement of changes in the concentration of particulate constituents. Coupling of the CGU-ACTJU sampler with on-line detection devices allows in-situ automated analysis of water-soluble aerosol components with high time resolution of 1 s (e.g., FIA detection for nitrite, nitrate or ammonium) or 1 hour (inorganic anions, dicarboxylic acids). Analysis of particulate water-soluble constituents will be demonstrated by measurement of inorganic anions and dicarboxylic acids in urban aerosol in Brno with time resolution of 1 hour using on-line coupled IC system.

Permanent Link: http://hdl.handle.net/11104/0300193