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Abstract
Wood pulp mill effluents continue to attract much attention due to environmental consequences. However, in comparison, very little work has been published on wood pulp extracts. In this study chemithermo-mechanical pulps (CTMP) as well as Kraft (sulphate) pulps were Soxhlet-extracted with three solvents of different polarity. Per cent extractives into the three solvents per air dried wood pulp were used as one of the bases for comparison. Analysis by gas chromatography (GC) using both a flame ionization detector (FID) and a mass selective detector (MSD) was performed. Significantly greater quantities of volatile extract were found with CTMP pulps than with Kraft pulps.