Air-liquid partition coefficients of aroma volatiles in frozen sugar solutions.
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.
Klooster
Jeroen R
JR
Unilever R&D Vlaardingen, Foods Research Centre, Olivier van Noortlaan 120, 3133 AT Vlaardingen, The Netherlands.
Druaux
Cécile
C
Vreeker
Rob
R
D000388:Air; D002241:Carbohydrates / Q000032:analysis / Q000737:chemistry*; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D004952:Esters / Q000737:chemistry; D005615:Freezing; D005632:Fructose / Q000737:chemistry; D007659:Ketones / Q000737:chemistry; D008433:Mathematics; D008956:Models, Chemical; D009812:Odorants / Q000032:analysis*; D012996:Solutions / Q000737:chemistry; D013395:Sucrose / Q000737:chemistry; D014835:Volatilization
D002241:Carbohydrates; D004952:Esters; D007659:Ketones; D012996:Solutions; D005632:Fructose; D013395:Sucrose