Preparation and characterisation of water-soluble phytosterol nanodispersions

Wai Leong, Oi Lai, Kamariah Long, Yaakob Man, Misni Misran, Chin Tan

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    Abstract

    The purpose of this study was to prepare and characterise water-soluble phytosterol nanodispersions for food formulation. The effects of several factors were examined: four different types of organic phases (hexane, isopropyl alcohol, ethanol and acetone), the organic to aqueous phase ratio and conventional homogenisation vs. high-pressure homogenisation. We demonstrated the feasibility of phytosterol nanodispersions production using an emulsification-evaporation technique. The results showed that hexane was able to produce the smallest particle size at a mean diameter of approximately 50 nm at monomodal distribution. Phytosterol nanodispersions prepared with a higher homogenisation pressure and a higher organic to aqueous phase ratio resulted in significantly larger phytosterol nanoparticles (P <0.05). Phytosterol loss after high-pressure homogenisation ranged from 3 to 28 , and losses increased with increasing homogenisation pressure. Elimination of the organic phase by evaporation resulted in a phytosterol loss of 0.5-9 .
    Original languageEnglish
    Pages (from-to)77 - 83
    Number of pages7
    JournalFood Chemistry
    Volume129
    Issue number1
    DOIs
    Publication statusPublished - 2011

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