Saturation vapor pressure characterization of selected low-volatility organic compounds using a residence time chamber

Abstract. Saturation vapor pressure (psat) is an important thermodynamic property regulating the gas-to-particle partitioning of organic compounds in atmosphere. Low-volatility (LVOCs), with sufficiently low psat values, primarily stay particle phase and contribute to aerosol formation. Obtaining accurate information on LVOCs requires volatility measurements performed at temperatures relevant atmospheric Here, we present isothermal evaporation method using a residence time chamber measure for dry single-compound nanoparticles 295 K. Our able characterize spanning from 10−8 10−4 Pa The included four polyethylene glycols (PEGs: PEG6, PEG7, PEG8, PEG9), two monocarboxylic acids (palmitic acid stearic acid), dicarboxylic (azelaic sebacic alcohols (meso-erythritol xylitol), one ester (di-2-ethylhexyl sebacate). There was good agreement between our measured values those reported by previous studies different measurement techniques, mostly within 1 order magnitude. Additionally, quantum-chemistry-based COSMOtherm calculations were estimate studied compounds. predicted most magnitude difference experimental computational estimates.