Characterization of chilean hazelnut (Gevuina avellana mol) seed oil


The fatty acid composition, tocopherol and tocotrienol content, and oxidative stability of petroleum benzene-extracted Gevuina avellana Mol (Proteaceae) seed oil were determined. Positional isomers of monounsaturated fatty acids were elucidated by gas chromatography-electron impact mass spectrometry after 2-alkenyl-4,4-dimethyloxazoline derivatization. This stable oil (Rancimat induction period at 110°C: 20 h) is composed of more than 85% monounsaturated fatty acids and about equal amounts (6%) of saturated and polyunsaturated (principally linoleic) fatty acids. Unusual positional isomers of monounsaturated fatty acids, i.e., C16:1 Δ11, C18:1 Δ12, C20:1 Δ11, C20:1 Δ15, C22:1 Δ17, and presumably C22:1 Δ19 were identified. The C18:1 Δ12 and C22:1 Δ19 fatty acids are described for the first time in G. avellana seed oil. While only minute quantities of α-, γ-tocopherols and β-, γ- and δ-tocotrienols were found, the oil contained a substantial amount of α-tocotrienol (130 mg/kg). The potential nutritional value of G. avellana seed oil is discussed on the basis of its composition.

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Correspondence to P. Lambelet.

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Bertoli, C., Fay, L.B., Stancanelli, M. et al. Characterization of chilean hazelnut (Gevuina avellana mol) seed oil. J Am Oil Chem Soc 75, 1037–1040 (1998).

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Key words

  • 2-Alkenyl-4,4-dimethyloxazoline
  • electron impact mass spectrometry
  • FAME
  • gas chromatography
  • Gevuina avellana
  • oxidative stability
  • tocotrienol