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Fatty and resin acids of spanish pinus pinaster Ait. Subspecies
Author(s) -
Arrabal Carlos,
Cortijo Manuel
Publication year - 1994
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02542276
Subject(s) - subspecies , saponification , chemistry , pinus pinaster , palmitic acid , chromatography , mediterranean climate , fraction (chemistry) , abietic acid , petroleum ether , abietane , botany , resin acid , organic chemistry , fatty acid , biology , extraction (chemistry) , diterpene , rosin , ecology
The qualitative and quantitative composition of the acid fraction of wood extractives from three Spanish Pinus pinaster Ait. subspecies (Atlantic, mountain Mediterranean and plain Mediterranean) were studied. Seven samples of each subspecies were prepared according to Technical Association of Pulp and Paper Standards, extracted with petroleum ether (b.p. 40–60°C) in a Soxhlet apparatus and saponified with ethanolic 0.4N potassium hydroxide. The acid fraction was methylated with diazomethane and studied by combined gas chromatography/mass spectrometry. The major constituents found were palmitic, oleic and linoleic among the fatty acids and pimaric, sandaracopimaric, levopimaric, isopimaric, abietic and dehydroabietic among the resin acids. Neoabietic and palustric acids were not found. Variations in the quantitative composition of the acid fraction enable us to distinguish the three subspecies. Main quantitative differences are found between the Atlantic subspecies and the two Mediterranean subspecies.