Analysis of phenolic compounds in two blackberry species (Rubus glaucus and Rubus adenotrichus) by high-performance liquid chromatography with diode array detection and electrospray ion trap mass spectrometry.
High-performance liquid chromatography with diode array (LC-DAD) and electrospray ionization mass spectrometric detection (ESI-MS) was used to analyze phenolic compounds of two blackberry species ( Rubus glaucus Benth. and Rubus adenotrichus Schlech.) growing in South America. UV-visible spectrophotometry was a valuable tool for identifying the class of phenolic compound, whereas MS and MS ( n ) fragmentation data were useful for their structural characterization. Ellagitannins were the major compounds, with sanguiin H-6 and lambertianin C being the predominant ones. The anthocyanin composition as well as the presence or absence of kaempferol glycosides can be used to distinguish the Rubus species studied. Flavonol hexoside-malonates were identified in both berries. Hydroxycinnamic acids were minor compounds and found as ferulic, caffeic, and p-coumaric acid esters. Similar contents were obtained by analysis of soluble ellagitannins and ellagic acid glycosides as ellagic acid equivalents and by analysis of ellagic acid equivalents released after acid hydrolysis.
Mertz
Christian
C
Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD), Département PERSYST, UMR Qualisud, TA B-95/16, F-34398 Montpellier cedex 5, France.
Cheynier
Veronique
V
Günata
Ziya
Z
Brat
Pierre
P
D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D003373:Coumaric Acids / Q000032:analysis; D005419:Flavonoids / Q000032:analysis; D005638:Fruit / Q000737:chemistry*; D047348:Hydrolyzable Tannins / Q000032:analysis; D010636:Phenols / Q000032:analysis*; D059808:Polyphenols; D027824:Rosaceae / Q000737:chemistry*; D021241:Spectrometry, Mass, Electrospray Ionization
D003373:Coumaric Acids; D005419:Flavonoids; D047348:Hydrolyzable Tannins; D010636:Phenols; D059808:Polyphenols