Rapid separation and identification of phenolics in crude red grape skin extracts by high performance liquid chromatography coupled to diode array detection and tandem mass spectrometry.
A rapid and efficient method was established for the simultaneous determination of structures and configurations for 45 phenolics isolated from crude red grape skin extracts without extensive sample preparation. Separation and compound assignments were achieved using high performance liquid chromatography coupled to diode array detection and tandem mass spectrometry (HPLC-DAD-MS(2)). A Poroshell 120 EC-C18 (100mm×3.0mm, 2.7μm) column was employed to separate the phenolics, which were eluted using a gradient of acetonitrile and water acidified with 0.2% formic acid. Phenolics were identified by comparison of their UV-vis spectra, mass spectra and MS(2) data with those in the literature. Using this procedure, five compounds were detected for the first time in Vitis amurensis. Good separation of most phenolics was achieved in 26min. The methods described here can be used for the characterization of phenolics in a variety of grapes and grape products.
School of Pharmaceutical Sciences, Shandong University, Jinan, China. Electronic address: jimei@sdu.edu.cn.
Mei
M
Ji
School of Bethune Medical Sciences, Jilin University, Changchun, China.
Chen
C
Li
Department of Obstetrics and Gynecology, Provincial Hospital Affiliated to Shandong University, Jinan, China.
Qiang
Q
Li
D002851:Chromatography, High Pressure Liquid / Q000379:methods; D010636:Phenols / Q000032:analysis*; D010936:Plant Extracts / Q000737:chemistry; D053719:Tandem Mass Spectrometry / Q000379:methods; D027843:Vitis / Q000737:chemistry*
D010636:Phenols; D010936:Plant Extracts
HPLC–DAD–MS(2); Phenolics; Red grape skin