کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1388196 | 982773 | 2009 | 5 صفحه PDF | دانلود رایگان |
Chitosan is a polysaccharide used in a broad range of applications. Many of its unique properties come from the presence of amino groups in its structure. A proper quantification of these amino groups is very important, in order to specify if a given chitosan sample can be used in a particular application. In this work, a comparison between the determination of chitosan degree of deacetylation by conductometry and CHN elemental analysis was carried out, using a rigorous error analysis. Accurate expressions relating CHN composition, conductometric titration, and degree of deacetylation, in conjunction with their associated errors, were developed and reported in this note. Error analysis showed conductometric analysis as an inexpensive and secure method for the determination of the degree of deacetylation of chitosan.
Typical conductometrical titration curve for the chitosan used in this work with chemical structures of chitosan before and after protonated amines are titrated.Figure optionsDownload as PowerPoint slide
Journal: Carbohydrate Research - Volume 344, Issue 18, 14 December 2009, Pages 2591–2595