Influence of Droplet Charge on the Chemical Stability of Citral in Oil-in-Water Emulsions

被引:30
作者
Choi, Seung Jun [1 ]
Decker, Eric Andrew [1 ]
Henson, Lulu [2 ]
Popplewell, L. Michael [2 ]
McClements, David Julian [1 ]
机构
[1] Univ Massachusetts, Dept Food Sci, Amherst, MA 01003 USA
[2] Int Flavors & Fragrances Inc, Union Beach, NJ 07735 USA
关键词
citral degradation; emulsions; lauryl alginate (LAE); polyoxyethylene (23) lauryl ether (Brij 35); sodium dodecylsulfate (SDS); SODIUM DODECYL-SULFATE; FORMATION MECHANISM; LIPID OXIDATION; SURFACTANT; ABILITY; IRON; CHELATORS; ALTER;
D O I
10.1111/j.1750-3841.2010.01693.x
中图分类号
TS2 [食品工业];
学科分类号
0832 ;
摘要
The chemical stability of citral, a flavor component widely used in beverage, food, and fragrance products, in oil-in-water emulsions stabilized by surfactants with different charge characteristics was investigated. Emulsions were prepared using cationic (lauryl alginate, LAE), non-ionic (polyoxyethylene (23) lauryl ether, Brij 35), and anionic (sodium dodecyl sulfate, SDS) surfactants at pH 3.5. The citral concentration decreased over time in all the emulsions, but the rate of decrease depended on surfactant type. After 7 d storage, the citral concentrations remaining in the emulsions were around 60% for LAE- or Brij 35-stabilized emulsions and 10% for SDS-stabilized emulsions. An increase in the local proton (H+) concentration around negatively charged droplet surfaces may account for the more rapid citral degradation observed in SDS-stabilized emulsions. A strong metal ion chelator (EDTA), which has previously been shown to be effective at increasing the oxidative stability of labile components, had no effect on citral stability in LAE- or Brij 35-stabilized emulsions, but it slightly decreased the initial rate of citral degradation in SDS-stabilized emulsions. These results suggest the surfactant type used to prepare emulsions should be controlled to improve the chemical stability of citral in emulsion systems.
引用
收藏
页码:C536 / C540
页数:5
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