Stir bar sorptive extraction with gas chromatography–mass spectrometry for the determination of resveratrol, piceatannol and oxyresveratrol isomers in wines

An integrated carbon entrapped molecularly imprinted polymer (MIP) electrode for voltammetric detection of resveratrol in wine

“…While the detection limits are higher than those reported by LC-UV ($3 mg L À1 ) and GC/MS, the detection limits are low enough for the detection of resveratrol in wines and other beverages. [33][34][35][36][37][38] Notably, this work demonstrates that CEMIP with DPV mode is a valid, rapid, and inexpensive method, and could be employed in lieu of the conventional methods which are lengthy due to the separation and derivatization demands. It is to be noted that for low concentrations of resveratrol, the CEMIP could be employed as a selective preconcentration platform analogous to a solid extraction platform integrated with a working electrode.…”

“…Overall, the results were within the range of commonly observed resveratrol levels in wines using the mainstream techniques. [33][34][35][36][37][38] It must be claried that the wine sample was obtained from an opened bottle, and as such does not necessarily conrm the determined resveratrol concentrations to be the true concentrations in a new unopened wine from this brand.…”

“…32 Rapid methods for the quanti-cation of resveratrol in wines are especially of interest, as current methods of analysis such as HPLC with uorescence, chemiluminescence or UV detection and silyl derivatization in tandem with GC-MS are lengthy. [33][34][35][36][37][38] The resveratrol based CEMIP was prepared by the use of a carbon microsphere core entrapped with polymer from the polymerization of methacrylic acid (MAA) as the monomer, ethylene glycol dimethacrylate (EGDMA) as the crosslinker, resveratrol as the template and acetonitrile as the porogenic solvent. The CEMIP electrode platform performance was compared to that of the conventional carbon MIP composite (CMIPC) electrode, where carbon/MIP polymers/eicosane (binder) are mixed and packed in micropipette tips.…”

Development and validation of a liquid chromatography with mass spectrometry method to determine resveratrol and piceid isomers in beeswax

“…Furthermore, the current trend in sample preparation techniques is focused on the simplification of those procedures to reduce the number or reagents and time spent on this step . Thus, the use of microextraction or stir bar sorptive extraction has become popular in recent years to determine stilbenes. Some of those sample treatments could be used in beeswax, but taking into account our experience and the good results obtained in recent research , we decided to use solvent extraction as the sample treatment.…”

A New, Rapid and Efficient HPLC Method to Assay Resveratrol in Food Supplements

“…Many papers were published describing quantitative determination in different matrices (wines, fruits, honey, plants and plant extracts, grape pomace, pharmaceutical dosage forms, biological fluids, etc): HPLC and UPLC with different detection [28][29][30][31][32][33][34][35][36][37], GC [38][39][40], CE [41][42][43], spectrofluorimetry [45][46], voltammetry [47,48], MEKC [49], by amperometric biosensor [50], by electrochemiluminescence [51] and by resonance light scattering technique [52].…”