from the reacetylation under soft conditions of a unique chitosan sample allowing the
preservation of the chain distribution. The study of the variation of pH for the same
concentration of amine groups, at different ionic strengths, on the scale of DA's allows us to
extrapolate the variation of p K a at dissociation degrees (α) 0 and 1. A modeling of all the
curves was obtained by means of only one equation. Then, for given concentration of …