title: Detection of non-coloured anthocyanin-flavanol derivatives in Rioja aged red wines by liquid chromatography-mass spectrometry.
abstract: Anthocyanins, responsible for wine colour, are involved in many reactions during wine ageing. Anthocyanin-flavanol associations give rise to derivatives in flavylium form that provide blue hues, but also derivatives that do not directly influence wine colour. These colourless derivatives remain mostly unknown but their roles during wine ageing are important for controlling wine quality. Colourless anthocyanin-flavanol derivatives formed during wine ageing have been studied in three aged red wines from Rioja using a combined method with Column Chromatography (CC) and High Performance Liquid Chromatography with Diode Array and Mass Spectrometric detections (HPLC-DADMS). Twenty-six compounds have been detected: 17 dimers with the anthocyanin in flavene form with possible anthocyanin-flavanol (type 1) and flavanol-anthocyanin (type 2) structures, and 9 with an A-type bicyclic anthocyanin-flavanol structure (type 3). Although some of malvidin derivatives have been previously reported, this is the first time that these derivatives (including different isomers) have also been detected for delphinidin, petunidin and peonidin.
authors.affiliation: Departamento de Química Analítica, Facultad de Ciencia y Tecnología, Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain.
authors.forename: María Belén
authors.initials: MB
authors.lastname: Sánchez-Ilárduya
authors.affiliation: Departamento de Química Analítica, Facultad de Ciencia y Tecnología, Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain.
authors.forename: Cristina
authors.initials: C
authors.lastname: Sánchez-Fernández
authors.affiliation: Departamento de Química Analítica, Facultad de Ciencia y Tecnología, Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain.
authors.forename: Sergio
authors.initials: S
authors.lastname: Garmón-Lobato
authors.affiliation: Departamento de Química Analítica, Facultad de Ciencia y Tecnología, Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain.
authors.forename: Beatriz
authors.initials: B
authors.lastname: Abad-García
authors.affiliation: Departamento de Química Analítica, Facultad de Ciencia y Tecnología, Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain.
authors.forename: Luis Angel
authors.initials: LA
authors.lastname: Berrueta
authors.affiliation: Departamento de Química Analítica, Facultad de Ciencia y Tecnología, Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain. Electronic address: blanca.gallo@ehu.es.
authors.forename: Blanca
authors.initials: B
authors.lastname: Gallo
authors.affiliation: Departamento de Química Analítica, Facultad de Ciencia y Tecnología, Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain.
authors.forename: Francisca
authors.initials: F
authors.lastname: Vicente
mesh_terms: D000872:Anthocyanins / Q000737:chemistry*; D002853:Chromatography, Liquid / Q000379:methods*; D044948:Flavonols / Q000737:chemistry*; D013058:Mass Spectrometry / Q000379:methods*; D014920:Wine
chemical_list: D000872:Anthocyanins; D044948:Flavonols
keywords: Ageing; Anthocyanins; Flavanols; Flavene; MS; Wine colour