Fingerprinting of anthocyanins from grapes produced in Brazil using HPLC-DAD-MS and exploratory analysis by principal component analysis.

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.