@article {17487, title = {Optimal routine conditions for the determination of the degree of acetylation of chitosan by 1H-NMR}, journal = {Carbohydrate Polymers}, volume = {61}, year = {2005}, month = {2005-04-13 00:00:00}, pages = {155}, abstract = {

Chitosan applications and properties mostly depend on its degree of acetylation, so methods that allow its accurate determination are needed.\ 1H-NMR taken in 2\% DCl solutions at 70\ {\textdegree}C is usually employed for that purpose but suffers from long experimental times. Here, it is demonstrated that this time can be dramatically reduced more than six-fold by simply performing the\ 1H-NMR experiment at 27\ {\textdegree}C (the standard NMR probe temperature) with 90{\textdegree} pulses. Routine conditions allowing DA determinations in less than 3.5\ min of NMR time per sample are described.

}, keywords = {Chitosan, NMR}, author = {Fernandez-Megia, E. and Novoa-Carballal, R. and Emilio, Q. and Riguera, R.} }