期刊
FOOD CHEMISTRY
卷 205, 期 -, 页码 155-162出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2016.03.008
关键词
Storage stability; pH; Ionic strength; Centrifugation speed; Heat treatment; Freeze-thaw cycle
资金
- National Plan For Science and Technology - King Abdulaziz City for Science and Technology [12-AGR 2494-02]
The stability of lutein nanodispersions was evaluated during storage and when exposed to different environmental conditions. Lutein nanodispersions were prepared using Tween 80, sodium dodecyl sulfate (SDS), sodium caseinate (SC) and SDS-Tween 80 as the emulsifiers. During eight weeks of storage, all samples showed remarkable physical stability. However, only the SC-stabilized nanodispersion showed excellent chemical stability. Under different environmental conditions, the nanodispersions exhibited a varied degree of stability. All nanodispersions showed constant particle sizes at temperatures between 30 and 60 degrees C. However, at pH 2-8, only the SC-stabilized nanodispersion was physically unstable. The addition of NaCl (300-400 mM) only caused flocculation in nanodispersion stabilized by SDS-Tween 80. All nanodispersions were physically stable when subjected to different centrifugation speeds. Only Tween 80-stabilized nanodispersion was stable against the effect of freeze-thaw cycles (no phase separation observed). In this study, there was no particular emulsifier that was effective against all of the environmental conditions tested. (C) 2016 Elsevier Ltd. All rights reserved.
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