Acid-base properties of quercetin in aqueous solutions are studied by the method chemical color measurements and dissociation constants (p K ) are determined. The p K values are assigned to corresponding functional groups of quercetin and a probable scheme of their dissociation is proposed. A diagram of the distribution of ion-molecular forms of quercetin in the pH range 1–13 is built.
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Чеботарев et al. (2014) studied this question.
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