A NEW METHOD FOR FAST LIGNIN QUANTITATION OF LIGNOCELLULOSIC BIOMASS

摘要

A new method for facile quantitation of lignin in lignocellulosic biomass was developed,in which acidic lithium bromide trihydrate(ALBTH)was used to dissolve and hydrolyze cellulose and hemicelluloses of the biomass,and lignin was left over as an insoluble residue and quantitated gravimetrically.The recommended reaction conditions are 60 wt％LiBr solution containing 40 mM HCl at 110 °C for 30 min.The ALBTH method was applied to different species of biomass including softwood(Douglas fir),hardwood(aspen,poplar,and eucalyptus),and herbage(corn stover and switchgrass),giving comparable lignin quantitation with the Klason method.