Characterization of Residual Lignins from Chemical Pulps of Spruce (Picea abies L.) and Beech (Fagus sylvatica L.) by Analytical Pyrolysis-Gas Chromatogaphy/Mass Spectrometry~1)

摘要

Residual lignins have been isolated by enzymatic hydrolysis from sulfite, kraft, ASAM and soda/ AQ/MeOH pulps obtained both of spruce and beech wood. The protein content of the samples were in The range of 2 to 61/100 and the carbohydrate content fluctuated roughly between 1 and 12/100. Seven of The isolates have been submitted to analytical pyrolysis (Py-GC/MS) aiming at the determination of the Lignin composition in terms of 4-hydroxyl-phenylpropane, guaiacylpropane, and syringylpropane units, Referred to in the following as H, G, and S units.