Characterization of lignin isolated from Iranian Fagus Orientalis wood

Lignin isolated from Fagus Orientalis by acidolytic dioxane method were characterized using alkaline nitrobenzene oxidation, elemental analysis, molecular weight analysis, GC-MS chromatography, FT-IR and HNMR spectroscopy. The results showed that Mw (weight average molecular weight) and Mn (number average molecular weight) of the lignin respectively is 15986 g/mol and 9746.9 g/mol. The ratio of S unit to G unit is 1.9 and C9 formula of Fagus Orientalis lignin is C9Hal 2.78Hph 2.1O2.144(OH)ph 0.673(OH)al 1.055(OCH3)1.66.