Chemical properties of Araucaria (Araucaria hunsteneii) sapwood and heartwood / Mohd Affandy Tajudin

The variability of chemical properties among sapwwod and heartwood were determined using methods in TAPPI Standards and the results were discusses in this paper. According to the species Araucaria hunsleneii (Araucaria) was selected as a main material in this study. The chemical in the sample wood included cellulose, hemicellulose, lignin and extraneous components. The experiment was carried out to know the percentage of chemical contains in Araucaria hunsteneii species. The chemical constituent results have shown cold water solubility for sapwood (1.899%) and heartwood (4.534%), hot water solubility for sapwwod (2.35%) and heartwood (5.09%), the alcohol-benzene solubility for sapwood (2.77%) and heartwood (6.895%), the Natrium Hydroxide solubility for sapwood (8.355%) and for heartwood (13.805%), the ash content for sapwood (0.36%) and heartwood (0.55%), the lignin contents for sapwood (28.51%) and for heartwood (30.175%). However, this studied must be continues for the next time to know the better result of chemical properties of Araucaria (Araucaria hunsteneii) wood.