Partitioning coefficients describe the behavior of a compound between different phases (gas, liquid, solid) and are of fundamental importance in diverse applications, such as design of effective odor abatement technologies and understanding the mechanisms by which flavor is released from foods and beverages.
Recently Professor Van Langenhove’s group at Ghent University published a novel and fast method for determining gas-to-liquid partitioning coefficients (KAW). Their new and fast SIFT-MS-based method was developed to determine the gas-to-liquid partitioning coefficients (KAW) of volatile organic compounds (VOCs). They used a dynamic absorption method in which a gas stream with a known and constant compound concentration is bubbled through a liquid volume.
The method developed by Van Langenhove et al. was applied to determine KAW for five odorous VOCs of significance to both environmental and food applications:
- Aldehydes: 2-methylpropanal, 3-methylbutanal and hexanal
- Organosulfur compounds: dimethyl sulfide and dimethyl disulfide.
Their work demonstrates the ability of SIFT-MS to simplify determination of fundamental parameters such as KAW in addition to analyzing the compounds in the end applications themselves.
The full paper Determination of the gas-to-liquid partitioning coefficients using a new dynamic absorption method (DynAb method) by Joren Bruneel, Christophe Walgraeve, Katrijn Van Huffel, Herman Van Langenhove (Chemical Engineering Journal, 283 (2016) 544–552) can be accessed at the publisher’s website.