The Lignin of the Diffuse Porous Angiosperm Tree Triplochyton scleroxylon K. Schum with Low Syringyl Content

摘要: Abstract “Milled wood lignin” was isolated from Triplochyton scleroxylon tree (wawa MWL) and subjected to elemental analysis before after acid treatment, analytical pyrolysis. Both FT-IR 1H NMR spectra were recorded. For comparison, lignins spruce beech by the MWL, dioxane/HCl (DIL), Cuene (CUL) techniques also characterized. The residual carbohydrate content of estimated. Wawa MWL is a GS lignin with 88% G 12% S content. utility pyrolysis for classification discussed. spectroscopy, calibrated data 50 MWLs (PLS approach), gives reliable results minimum experimental work. yields phenols obtained has be multiplied factor around 0.5 correction if low. cross-linking indices OHphen/OHaliph ratios increase in order < DIL CUL. spectroscopy helpful recognize S/G ratio lignin.