Abstract
Cellulose and xylan, extracted from wheat bran with polar ionic liquids (ILs), were quantified using 1H NMR spectroscopy. Both No-D NMR and solvent suppression techniques were applied to realize direct analysis of extracts in nondeuterated ILs. As models of extracts, mixtures of cellulose and xylan dissolved in ILs were measured with 1H NMR spectroscopy. There was a linear relation between mixing ratio and specific peak area of each polysaccharide. Extracts from bran in ILs were analyzed with the obtained calibration curve. This NMR analysis was confirmed to be applicable to three representative ILs used for extraction of polysaccharides. A relation between extracted amount and extraction conditions was obtained.
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