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Journal of Wood Science

, Volume 53, Issue 6, pp 533-540

Comparative study on the chemical composition of lipophilic fractions from three wood tissues of Eucalyptus species by gas chromatography-mass spectrometry analysis

  • Flaviano Oliveira SilvérioAffiliated withDepartment of Chemistry, Federal University of ViçosaDepartment of Chemistry, Federal University of Minas Gerais
  • , Luiz Cláudio Almeida BarbosaAffiliated withDepartment of Chemistry, Federal University of Viçosa Email author 
  • , Armando J. D. SilvestreAffiliated withCICECO and Department of Chemistry, University of Aveiro
  • , Dorila Piló-VelosoAffiliated withDepartment of Chemistry, Federal University of Minas Gerais
  • , José Lívio GomideAffiliated withDepartment of Forest Engineering, Federal University of Viçosa

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Abstract

Abstract The chemical compositions of lipophilic fractions from Eucalyptus urograndis and Eucalyptus urophylla cultivated in Brazil and Eucalyptus camaldulensis from Mexico were determined by gas chromatography-mass spectrometry (GC-MS) before and after alkaline hydrolysis followed by derivatization. In all fractions, fatty acids (including small amounts of α-and ω-hydroxy fatty acids) and sterols were the most abundant components followed by smaller amounts of long-chain aliphatic alcohols, phenolic acids, and hydrocarbons. The presence of steroid esters and triacylglycerols in all three species was indirectly confirmed by the increased amount of fatty acids and sterols (manly β-sitosterol) in the hydrolyzed fractions compared with the corresponding nonhydrolyzed fractions. The amount of liphophilic compounds (mainly fatty acids and sterols) identified in hydrolyzed fractions of E. urograndis, E. camaldulensis, and E. urophylla corresponded to 1921, 1915, and 634 mg kg−1 of dry matter, respectively. The lower abundance of fatty acids and sterols in the fractions from E. urophylla indicates that problems related to pitch formation will be less severe for this species than for the other two.

Key words

Lipophilic extract Pitch Eucalyptus camaldulensis Eucalyptus urograndis Eucalyptus urophylla