Air-liquid partition coefficients of aroma volatiles in frozen sugar solutions |
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Authors: | Klooster Jeroen R Druaux Cécile Vreeker Rob |
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Institution: | Unilever R&D Vlaardingen, Foods Research Centre, Olivier van Noortlaan 120, 3133 AT Vlaardingen, The Netherlands. |
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Abstract: | Static headspace gas chromatography was used to measure air-solution partition coefficients of homologous series of methyl ketones and ethyl esters in aqueous sugar solutions. The measurements were performed in a temperature range from 25 to -25 degrees C. A rather unexpected temperature dependence of the partition coefficients was observed at subzero temperatures; that is, partition coefficients were found to increase in the temperature interval from 0 to -10 degrees C. A simple model, based on the freeze concentration effect, is proposed to explain the observed temperature dependence. |
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