Octanol-air partition coefficient as a predictor of partitioning of semi-volatile organic chemicals to aerosols

Abstract From a review of existing correlations for KP the partition coefficient of semi-volatile organic chemicals (SOCs) between aerosol and gaseous phases, it is suggested that the octanol-air partition coefficient (KOA) may be a valuable direct descriptor of SOCs volatility and may be preferable to the use of the experimentally inaccessible subcooled liquid-vapor pressure. Successful two parameter correlations are developed between log KP and log KOA, and an even simpler one parameter correlation is suggested that the ratio K P K OA is approximately constant for a class of SOCs.

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