title: Trans-Stilbenes in Commercial Grape Juices: Quantification Using HPLC Approaches.
abstract: Trans-stilbenes belong to the group of polyphenolic phytoalexins, and occur in many plant foods. These compounds have received great attention by researchers due to their well-known beneficial health effects. In the present study a chromatographic method that comprises the use of variable wavelength (VWD) and fluorescence (FLD) detectors in series for the analysis oftrans-stilbenes is presented. The relation of peak-area obtained with both detectors is proposed as an alternative and complementary approach for the rapid identification of these phenolic compounds. The proposed method was applied to determinetrans-stilbenes in commercial fruit juices.Trans-piceid was the most commontrans-stilbene found in the samples analyzed. The method was validated in terms of linearity, sensitivity and repeatability. Appropriate sensitivity and good linearity (r² > 0.9991) were achieved.
authors: Faculty of Pharmacy, Department of Analytical Chemistry, Nutrition and Food Science, University of Santiago de Compostela, Campus Vida, 15782 Santiago de Compostela, Spain. julia.lopez.hernandez@usc.es.
authors: Julia
authors: J
authors: López-Hernández
authors: Faculty of Pharmacy, Department of Analytical Chemistry, Nutrition and Food Science, University of Santiago de Compostela, Campus Vida, 15782 Santiago de Compostela, Spain. ana.rodriguez.bernaldo@usc.es.
authors: Ana
authors: A
authors: Rodríguez-Bernaldo de Quirós
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D005638:Fruit / Q000737:chemistry; D000067030:Fruit and Vegetable Juices / Q000032:analysis*; D013267:Stilbenes / Q000032:analysis*; D027843:Vitis / Q000737:chemistry*
chemical_list: D013267:Stilbenes
keywords: commercial fruit juices; fluorescence detector; high-performance liquid chromatography; trans-stilbenes; variable wavelength detector