Comparison of Physicochemical Characteristics of Alkali Refined and Esterified Rice Bran Oils

알칼리 정제(精製)와 에스테르화에 의한 미강유의 이화학적(理化學的) 특성(特性)의 비교(比較)

  • 김현구 (농어촌개발공사 종합식품연구원) ;
  • 신동화 (농어촌개발공사 종합식품연구원) ;
  • 신효선 (동국대학교 식품공학과)
  • Published : 1985.06.01

Abstract

The alkali refined rice bran oil (ARBO) and the esterified rice bran oil (ERBO) with glycerol were analyzed for their physicochemical charateristics and the compositions. Specific gravity, refractive index and yellowness of ERBO was higher than ARBO but smoking point was 60-$80^{\circ}C$ higher than ERBO. The free fatty acid content was 0.05% a ARBO and 0.88-1.36% ERBO. The wax was not detected in ARBO but the soft and hard waxes were detected in ERBO. The lipids were composed of 98-99% neutral lipid, 0.2-0.5% glycolipid and 0.1-0.5% of phospholipid in all samples. The triglyceride content of neutral lipid was 96.3% ARBO and 93.0-94.1% ERBO, and its monoglyceride content was 0.11% ARBO and 0.39-0.69% ERBO. The major fatty acid composition of samples were 41-42% oleic, 36-40% linoleic and 17-18% of palmitic acid.

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