Abstract
We demonstrate that the equilibrium hygroscopic response of an aerosol droplet and the kinetics of water condensation and evaporation can be retrieved with high accuracy, even close to saturation, through comparative measurements of probe and sample aerosol droplets. The experimental methodology is described and is based on an electrodynamic balance with a newly designed trapping chamber. Through use of a probe aerosol, composed of either pure water or a sodium chloride solution of known concentration, the gas-phase relative humidity (RH) can be accurately measured with an uncertainty of typically
Original language | English |
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Pages (from-to) | 5819-5826 |
Number of pages | 8 |
Journal | Analytical Chemistry |
Volume | 85 |
Issue number | 12 |
DOIs | |
Publication status | Published - 18 Jun 2013 |
Keywords
- SODIUM-CHLORIDE AEROSOL
- LOW RELATIVE-HUMIDITY
- THERMODYNAMIC MODEL
- ORGANIC-COMPOUNDS
- ELECTRODYNAMIC BALANCE
- ACTIVITY-COEFFICIENTS
- MASS ACCOMMODATION
- AQUEOUS AEROSOLS
- AMMONIUM-SULFATE
- GLASSY AEROSOL