The seasonal changes in the lipophilic extractives content and composition of black spruce (Picea mariana), balsam fir (Abies balsamea), and their associated TMP-mill samples

Grimmett, Mark G. (2002) The seasonal changes in the lipophilic extractives content and composition of black spruce (Picea mariana), balsam fir (Abies balsamea), and their associated TMP-mill samples. Masters thesis, Memorial University of Newfoundland.

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Abstract

Wood cores were collected from living trees and already harvested trees on a monthly basis. During the same period, mill samples were collected monthly at six different locations in the production line at Corner Brook Pulp and Paper, a thermomechanical pulp mill in Newfoundland. Wood cores were divided into sapwood and heartwood portions and analyzed separately. The quantity and composition of the lipophilic extractives for each sample were determined. No consistent seasonal changes in total extractives were observed for the wood cores and mill samples. Gas chromatography analysis of the mill sample extracts showed changes in lipophilic extractive components during the papermaking process. Species-specific differences were also found in the chromatograms of fir and spruce samples.

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