Citral stability in oil-in-water emulsions with solid or liquid octadecane.
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.
Mei
Longyuan
L
Department of Food Science, University of Massachusetts, Amherst, Massachusetts 01003, USA.
Choi
Seung Jun
SJ
Alamed
Jean
J
Henson
Lulu
L
Popplewell
Michael
M
McClements
D Julian
DJ
Decker
Eric A
EA
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*
D000473:Alkanes; D004655:Emulsions; D009821:Oils; D014867:Water; C022883:octadecane