Identification and quantification of the major phenolic constituents in Juglans regia L. peeled kernels and pellicles, using HPLC–MS/MS

This study was designed to identify and quantify the major phenolic constituents in peeled kernel pellicle of walnut Juglans regia L. Data were compared across six different cultivars: 'Fernor', 'Fernette', 'Franquette', 'Sava', 'Krka' 'Rubina'. High-performance liquid chromatography coupled with mass spectrometry used these compounds. Nineteen ellagitanins, 12 ellagic acid derivatives, 4 anthocyanins 5 other phenols identified walnuts, 15 dicarboxylic derivatives 1 phenol kernels. Thirteen previously unreported compounds kernels, 14 pellicle. Hydrolysable tannins main accounted for 31.0% 35.1% total phenolics analysed. The highest intake content per can be obtained by consumption 'Franquette' 'Rubina', lowest 'Krka'.