With increasing degrees of substitution of the cationic starch molecules, the consumption of titrant increases.
Method Polyelectrolyte titration
Sample Cationic starch
Solid Content 0.1 %
Sample preparation A mixture of 1.00 g starch and 99.0 g deionized water, heated to boiling point (about 10 min) until a clear solution is obtained. Subsequently fill up 10.0 g of this solution with 90.0 g deionized water. Use 10.0 ml of this solution for the titration.
Titrant 0.001 N PES-Na
Equipment PCD03, PCD-T3