title: Influence of rutin and ascorbic acid in colour, plum anthocyanins and antioxidant capacity stability in model juices.
abstract: Model juices at pH 3.7 were prepared with different combinations of ascorbic acid, rutin (quercetin 3-rutinoside) and concentrated anthocyanin extract of plums (cv. Black Gold). The anthocyanins in the concentrated extract were cyanidin 3-glucoside and cyanidin 3-rutinoside, in a proportion of 76% and 24% respectively. The model juices were stored during 17 weeks in darkness at 20 °C. The colour stability was improved by the presence of rutin and strongly damaged by the ascorbic acid. The fortification of anthocyanin model juices with ascorbic acid originated the degradation of most of anthocyanins. However, anthocyanins improved ascorbic acid stability during storage. The copigmentation of anthocyanin and rutin showed a beneficial effect on colour stability from the 5 weeks of storage. In model juices prepared exclusively with purified plum extract a high correlation (R(2)=0.881) between anthocyanins and antioxidant capacity was found.
authors.affiliation: Department of Agro-Food Technology, Universidad Miguel Hernández, Ctra. Beniel, km. 3.2, CP 03.312 Orihuela (Alicante), Spain.
authors.forename: J A
authors.initials: JA
authors.lastname: Hernández-Herrero
authors.affiliation: Department of Agro-Food Technology, Universidad Miguel Hernández, Ctra. Beniel, km. 3.2, CP 03.312 Orihuela (Alicante), Spain. Electronic address: mj.frutos@umh.es.
authors.forename: M J
authors.initials: MJ
authors.lastname: Frutos
mesh_terms: D000872:Anthocyanins / Q000032:analysis*; D000975:Antioxidants / Q000494:pharmacology*; D001205:Ascorbic Acid / Q000494:pharmacology*; D001628:Beverages / Q000032:analysis*; D003116:Color; D010936:Plant Extracts / Q000494:pharmacology*; D027861:Prunus / Q000737:chemistry*; D012431:Rutin / Q000494:pharmacology*
chemical_list: D000872:Anthocyanins; D000975:Antioxidants; D010936:Plant Extracts; D012431:Rutin; D001205:Ascorbic Acid
keywords: Copigmentation; Cyanidin 3-glucoside; Prunus salicina L.; Quercetin 3-rutinoside; VCEAC