Determination of the degree of deacetylation of chitin and chitosan by X-ray powder diffraction |
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| Authors: | Zhang Yongqin Xue Changhu Xue Yong Gao Ruichang Zhang Xiuli |
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| Affiliation: | Department of Food Science and Engineering, Ocean University of China, Qingdao 266003, China. |
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| 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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| Keywords: | Degree of deacetylation Chitin Chitosan X-ray powder diffraction |
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