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Identification and Quantification of Nonvolatile Lipophilic Substances in Fresh Sapwood and Heartwood of Lodgepole Pine (Pinus contorta Dougl.) by Yong Gao; Tao Chen; Colette Breuil is a Engineering article available to read on EtoBox.

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Content and composition of lipophilic extractives from fresh sapwood and heartwood of lodgepole pine (Pinus contorta Dougl.) were investigated by solid-phase extraction, GC and GC-MS techniques. The acetone extractive content in sapwood was 1.9-2.2% of oven dry wood, among which were included 1.1-1.3% triglycerides, 0.02-0.03% free fatty acids, 0.3-0.4% free resin acids, 0.15-0.21% steryl esters and waxes, 0.02 % monoglycerides, and 0.02-0.03 % sterols, fatty alcohols and diglycerides. A considerably higher amount of extractives was present in heartwood, i.e., 10-12%, including 0.6-0.7 % triglycerides, 0.8-1.1% free fatty acids, 4.0-5.6% free resin acids, 0.25-0.33 % steryl esters and waxes, 0.4-0.5% monoglycerides, and 0.08-0.1% sterols, fatty alcohols and diglycerides. The most abundant fatty acid residues in the wood triglycerides were oleic (18:1), linoleic (18:2), linolenic (18.-3) and palmitic (16:0) acids. Together they formed about 85 % and 65 % of the total fatty acid composition in the sapwood and heartwood triglycerides, respectively. Of the steryl esters and waxes, 18:2 was the most dominant residue, followed by 18:3 and 18:1. Twelve major free fatty acids and seven fre

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Author

Yong Gao; Tao Chen; Colette Breuil

Published

1995

Language

EN

Field

Engineering (Physical Sciences)