Table 2.

Several characterization methods to evaluate the deacetylation degree and average molecular weight of chitosan.

Characterization Methods	Chitosan Property	Ref.
Potenciometric titration	Deacetylation degree	[12,13]
Elemental analysis		[14]
Fourier transform infrared (FTIR)		[15,16,17,18]
Nuclear magnetic resonance (NMR)		[19,20]
Viscosimetry	Molecular weight	[21,22]
Gel permeation chromatography		[23,24,25]