METHOD OF DETERMINING DEGREE OF DEACETYLATION OF CHITOSAN

摘要

FIELD: chemistry.;SUBSTANCE: method involves taking a certain weighed amount of chitosanium chromate which is first purified from extraneous impurities and reduced to constant weight. The weighed amount is then turned into a stable weighted form through thermal treatment on air at temperature 800-900°C to form chromium oxide Cr₂O₃. The weight of the formed chromium oxide is then determined. Content of chromic acid in the initial weighed amount of chitosanium chromate is then calculated from the weight of chromium oxide. The degree of deacetylation of chitosan is calculated using defined formulae.;EFFECT: invention enables to increase accuracy of determining degree of deacetylation of chitosan.;2 ex