ASVAP is a collaboration with the Department of Physics and Astronomy at Aarhus University. The scope of the project is to build a novel instrument for accurate and direct measurement of saturation vapour pressures of low-volatile substances in collaboration with Associate Professor Aurelien R. Dantan and Associate Professor Henrik B. Pedersen. Our part of the project is described under research as: 

Many of the observed compounds in the atmosphere have low volatilities – i.e. they prefer to exist in the condensed phase and do not readily evaporate. Despite the low volatilities of the compounds, their relatively large abundance entails that a significant amount of the compounds are found in the gas phase in the atmosphere. Since the compounds tend not to evaporate, it is difficult to determine the thermodynamic parameters, which relates to the partitioning between the condensed phase and the gas phase. The ASVAP project is about determining these parameters, the central parameter being the saturation vapor pressure. In a collaboration with the Institute of Physics and Astronomy, Aarhus University, we are building a new instrument to measure very low vapor pressures of pure compounds. In the atmospheric simulation chamber AURA, we are working on determining the parameters based on equilibriums between a gaseous phase and a particle phase. The goal is to determine the relevant parameters with high accuracies which will contribute to a larger understanding of the atmospheric system.

Funding: FORSKNINGSPROJEKT 2 TEKNOLOGI OG PRODUKTION, 2020