What is the procedure to find the viscosity of chitosan solution?
Use a viscometer or rheometer.
The viscosity of a polymer solution is strongly dependent on concentration and the molar mass of the polymer. Additional information might be found in the following article:
Rheological properties of chitosan solutions
JK Hwang, HH Shin - Korea-Australia Rheology Journal, 2000 - pdfs.semanticscholar.org
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https://en.wikipedia.org/wiki/Viscosity
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