Furthermore, the acid-soluble lignin contents were determined by UV/vis spectroscopy at 320 nm, while the acid-insoluble lignin contents were determined by drying the acid treated samples at 575 ◦C
Furthermore, the acid-soluble lignin contentswere determined by UV/vis spectroscopy at 320 nm, while theacid-insoluble lignin contents were determined by drying the acid treatedsamples at 575 ◦C