Polyphenolic profile of selected varieties of Serbian berries

Selected varieties of strawberries, blackberries, and blueberries grown in Serbia have been analyzed, and their polyphenolic profile was determined by HPLC analysis. The occurrence of phenolic acids, flavonols, and anthocyanins has been examined. Caffeic, p-coumaric, ferulic, and ellagic acid were identified and quantified. Six flavonols have been identified in berry samples: quercetin, quercetin-glucoside, quercetin-galactoside, kaempferol, kaempferol-glucoside, and rutin. The following anthocyanins were found in strawberries: pelargonidin-glucoside, pelargonidin-rutinoside, cyanidin-glucoside, and cyanidin-malonylglucoside. Cyanidin-glucoside, cyanidin-rutinoside, and cyanidin-malonylglucoside were found in blackberry samples. The following anthocyanins were found in blueberries: delphinidin-galactoside, delphinidin-glucoside, delphinidin-arabinoside, cyanidin-galactoside, cyanidin-glucoside, cyanidin-arabinoside, petunidin-arabinoside, petunidin-galactoside, peonidin-galactoside, and malvidin-galactoside. Statistical multivariate method – principal component analysis (PCA) was used to classify phenolic acids, flavonols, and anthocyanins according to their contents in berry samples. Cluster analysis (CA) was used to classify samples based on the individual polyphenolics content.