Comparison of the classical wood extraction method using a Soxhlet apparatus with an advanced extraction method

摘要

Extraction of wood meal is generally the first, very time consuming step during the wet chemical analysis of wood and wood components. Solvents like toluene, benzene, dichloromethane, ethanol, methanol and water with increasing polarity are used in accordance with standard methods using a Soxhlet apparatus. The comparison of the standard method with the advanced extraction method clearly showed that the lower solvent demand and the thoroughly removal of the solvent at the end of an extraction step increased the effectiveness of the following washing step. The time need for the determination of the extractives contents and the standard deviations of the repeated measurements could be halved.