title: Citral stability in oil-in-water emulsions with solid or liquid octadecane.
abstract: Citral stability in oil-in-water emulsions at pH 3.0 with solid or liquid octadecane was determined. Citral degradation was faster in anionic sodium dodecyl sulfate (SDS)-stabilized emulsions than non-ionic polyoxyethylene (23) lauryl ether (Brij)-stabilized emulsions. Crystallization of octadecane in both Brij- and SDS-stabilized emulsion droplets resulted in faster degradation of citral. Crystallization of octadecane in emulsion droplets increased citral partitioning into the aqueous phase, with 41-53% of the total citral in the aqueous phase when octadecane was solid compared to 18-25% when octadecane was liquid. This research suggests that factors that increase partitioning of citral out of the droplets of oil-in-water emulsions increase citral degradation rates. These results suggest that the stability of citral could be increased in oil-in-water emulsions by technologies that decrease its partitioning and exposure to acidic aqueous phases.
authors.affiliation: Department of Food Science, University of Massachusetts, Amherst, Massachusetts 01003, USA.
authors.forename: Longyuan
authors.initials: L
authors.lastname: Mei
authors.forename: Seung Jun
authors.initials: SJ
authors.lastname: Choi
authors.forename: Jean
authors.initials: J
authors.lastname: Alamed
authors.forename: Lulu
authors.initials: L
authors.lastname: Henson
authors.forename: Michael
authors.initials: M
authors.lastname: Popplewell
authors.forename: D Julian
authors.initials: DJ
authors.lastname: McClements
authors.forename: Eric A
authors.initials: EA
authors.lastname: Decker
mesh_terms: D000473:Alkanes / Q000737:chemistry*; D004355:Drug Stability; D004655:Emulsions / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D009821:Oils / Q000737:chemistry*; D013499:Surface Properties; D014867:Water / Q000737:chemistry*
chemical_list: D000473:Alkanes; D004655:Emulsions; D009821:Oils; D014867:Water; C022883:octadecane