Effects of pectolytic treatment of Ziziphus mauritiana L. mash on the antioxidant content and activity of the fruit juice

Jujube (Ziziphus mauritiana L.) is a tropical fruit which is rich in phenolic compounds and ascorbic acid. In this study, jujube mash was treated with pectinase preparation for juice extraction. The effects of pectinase concentration and pectolytic time on the total phenolic and ascorbic acid content, as well as the antioxidant capacity of jujube juice, were investigated. Response surface methodology was then used to optimize the conditions of the pectolytic treatment. An increase in pectinase...