title: Fingerprinting of anthocyanins from grapes produced in Brazil using HPLC-DAD-MS and exploratory analysis by principal component analysis.
abstract: The anthocyanin profile was studied for 11 types of grapes of different varieties and geographical origins, including 10 wine grape varieties (Vitis vinifera) and one hybrid variety. Twenty anthocyanins were identified by means of the absorbance spectrum and fragmentation pattern by tandem mass spectrometry. The multivariate method of principal component analysis (PCA) was used to evaluate differences amongst the cultivars. The results show the hybrid grape separated from a cluster represented by viniferas grapes, mainly due to anthocyanin diglucosides. Within this group, it was possible to discriminate the different wine grapes. Clusters discriminating according to geographical origin were not observed.
authors.affiliation: Instituto de Química de São Carlos, Universidade de São Paulo, 13560-970 São Carlos, SP, Brazil.
authors.forename: Karina
authors.initials: K
authors.lastname: Fraige
authors.forename: Edenir R
authors.initials: ER
authors.lastname: Pereira-Filho
authors.forename: Emanuel
authors.initials: E
authors.lastname: Carrilho
mesh_terms: D000872:Anthocyanins / Q000032:analysis* / Q000737:chemistry; D001938:Brazil; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D005638:Fruit / Q000737:chemistry*; D013058:Mass Spectrometry / Q000379:methods*; D025341:Principal Component Analysis; D027843:Vitis / Q000737:chemistry*
chemical_list: D000872:Anthocyanins
keywords: Anthocyanins; Chromatographic fingerprint; Grapes; Principal component analysis