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Triterpene alcohols and sterols of Spanish olive oil

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Journal of the American Oil Chemists Society

Abstract

Nine Spanish olive oils, including three each of virgin (pressed oil), refined virgin, and B-residue (solvent-extracted pomace oil) oils from different commercial sources, have been analyzed for their unsaponifiable matter (USM). Four sterolic fractions separated from the oils have been analyzed by preparative thin-layer chromatography (TLC); these fractions are triterpene alcohols, 4-methylsterols, sterols and triterpene dialcohols. The compositions of the four sterolic fractions were determined as their acetates by gas-liquid chromatography (GLC) on an OV-17 glass capillary column. Identification of each component was carried out by argentation TLC, GLC and combined gas chromatography-mass spectrometry (GC-MS); 44 components were identified, of which four: 24-methylene-31-nor-9(11)-lanostenol, 24-methyl-31-nor-E-23-dehydrocycloartanol, 24-ethyl-E-23-dehydrolophenol and 5,E-23-stigmastadienol, were considered to be new sterols from natural sources. Several characteristics, including the content of triteterpene dialcohols in the USM and that of C-24(28) unsaturated sterols in each of the four sterolic fractions, which can be used to distinguish between virgin and B-residue olive oils, were observed.

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Authors and Affiliations

  1. College of Science and Technology, Nihon University 1-8, Kanda Surugadai, Chiyoda-ku, 101, Tokyo, Japan

    T. Itoh, K. Yoshida, T. Yatsu, T. Tamura & T. Matsumoto

  2. Northern Regional Research Center, Agricultural Research, Science and Education Administration, USDA, 61604, Peoria, IL

    G. F. Spencer

Authors
  1. T. Itoh
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  2. K. Yoshida
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  3. T. Yatsu
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  4. T. Tamura
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  5. T. Matsumoto
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  6. G. F. Spencer
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Itoh, T., Yoshida, K., Yatsu, T. et al. Triterpene alcohols and sterols of Spanish olive oil. J Am Oil Chem Soc 58, 545–550 (1981). https://doi.org/10.1007/BF02541591

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  • DOI: https://doi.org/10.1007/BF02541591

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