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  • Title: Determination of the degree of deacetylation of chitin and chitosan by X-ray powder diffraction.
    Author: Zhang Y, Xue C, Xue Y, Gao R, Zhang X.
    Journal: Carbohydr Res; 2005 Aug 15; 340(11):1914-7. PubMed ID: 15963961.
    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.
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