title: Influence of storage conditions on the stability of monomeric anthocyanins studied by reversed-phase high-performance liquid chromatography.
abstract: The effect of light, storage time and temperature on the decomposition rate of monomeric anthocyanin pigments extracted from skins of grape (Vitis vinifera var. Red globe) was determined by reversed-phase high-performance liquid chromatography (RP-HPLC). The impact of various storage conditions on the pigment stability was assessed by stepwise regression analysis. RP-HPLC separated well the five anthocyanins identified and proved the presence of other unidentified pigments at lower concentrations. Stepwise regression analysis confirmed that the overall decomposition rate of monomeric anthocyanins, peonidin-3-glucoside and malvidin-3-glucoside significantly depended on the time and temperature of storage, the effect of storage time being the most important. The presence or absence of light exerted a negligible impact on the decomposition rate.
authors.affiliation: National Agronomical Station, Quinta do Marques, Oeiras, Portugal.
authors.forename: Helena
authors.initials: H
authors.lastname: Morais
authors.forename: Cristina
authors.initials: C
authors.lastname: Ramos
authors.forename: Esther
authors.initials: E
authors.lastname: Forgács
authors.forename: Tibor
authors.initials: T
authors.lastname: Cserháti
authors.forename: José
authors.initials: J
authors.lastname: Oliviera
mesh_terms: D000872:Anthocyanins / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D012044:Regression Analysis; D015203:Reproducibility of Results; D027843:Vitis / Q000737:chemistry*
chemical_list: D000872:Anthocyanins