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Effects of organic acids on the extraction rate of anthocyanin pigment from purple-fleshed sweet potato were investigated. The experimental data well fitted the Singh and Kulshrestha´s model. Activation energies for the extraction were 42.57, 65.44, 79.87, and 74.69 kJ/㏖ for acetic, citric, lactic, and malic acids, respectively. Kinetic compensation effect was observed between activation energies and pre-exponential factors for the reaction, whose isokinetic temperature was 46.2℃
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