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Uv Spectroscopy: A Novel Method for Determination of Degree of Substitution of Phthaloyl Group As Amine Protector in Chitosan Publisher



Hajirasouliha F2, 3 ; Omidi H4 ; Omid NJ1 ; Dorkoosh FA1
Authors

Source: Zeitschrift fur Physikalische Chemie Published:2023


Abstract

The purpose of this study is to introduce and develop a new experimental method based on UV spectroscopy for measuring the degree of substitution (DS) of phthaloyl group used for protecting amine group in chitosan, a biopolymer derived from chitin that has a wide variety of applications including drug delivery in pharmaceutical products. N-phthaloylated chitosan was synthesized and the UV absorption measurements were performed on its solutions with different DS with concentrations of 6.25, 12.5, 25, 50, and 100 μg/mL in DMSO at 295 nm. The accuracy of the method was checked with H-NMR and there was consistency between the results obtained by two methods. This suggests that the UV spectroscopy can be a potential method for the characterization of the polymer and can replace the difficult methods of analysis used for the chemical structure. © 2023 De Gruyter. All rights reserved.
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