title: Determination of the degree of deacetylation of chitin and chitosan by X-ray powder diffraction.
abstract: A new method to determine the degree of deacetylation (DD) of alpha-chitin and chitosan in the range of 17-94% DD using X-ray powder diffraction (XRD) is proposed. The results were calibrated using (1)H NMR spectroscopy for chitosan and FTIR for chitin, in comparison with the potentiometric titration method. The results showed a good linear correlation between the CrI020 from XRD and the calibrated DD value. This method is found to be simple, rapid and nondestructive to the sample.
authors.affiliation: Department of Food Science and Engineering, Ocean University of China, Qingdao 266003, China.
authors.forename: Yongqin
authors.initials: Y
authors.lastname: Zhang
authors.forename: Changhu
authors.initials: C
authors.lastname: Xue
authors.forename: Yong
authors.initials: Y
authors.lastname: Xue
authors.forename: Ruichang
authors.initials: R
authors.lastname: Gao
authors.forename: Xiuli
authors.initials: X
authors.lastname: Zhang
mesh_terms: D000107:Acetylation; D000818:Animals; D002138:Calibration; D002236:Carbohydrate Conformation; D002686:Chitin / Q000737:chemistry*; D048271:Chitosan / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D033362:Powder Diffraction; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D014961:X-Ray Diffraction / Q000379:methods*
chemical_list: D002686:Chitin; D048271:Chitosan