title: Development and validation of a method for the determination of (E)-resveratrol and related phenolic compounds in beverages using molecularly imprinted solid phase extraction.
abstract: A molecularly imprinted polymer was prepared using (E)-resveratrol as template and was evaluated for multicomponent multiclass analysis of polyphenolic compounds in complex matrices such as natural and alcoholic beverages. Chromatographic evaluation of the polymer exhibited high selectivity for (E)-resveratrol and its structural analogues, quercetin, and other flavonoids. An analytical procedure based on molecularly imprinted solid phase extraction (MISPE) and high-performance liquid chromatography coupled to UV detector was developed and validated for determination of (E)-resveratrol and quercetin in wine and fruit juice samples. The specific binding capacity of the MIP was estimated as 80 μg g(-1) polymer by the cartridge test. MISPE sample pretreatment allows an excellent sample cleanup, enormously decreasing the number of coextracted potentially interfering compounds. Under the described conditions, by extracting 2 mL samples a clean extract is obtained and (E)-resveratrol and quercetin could be easily identified at concentration levels of, respectively, 1.5 and 7.0 μg L(-1).
authors.affiliation: Department of Pharmaceutical and Biomedical Science, Salerno University, Fisciano, SA, Italy.
authors.forename: Maria Anna
authors.initials: MA
authors.lastname: Euterpio
authors.forename: Imma
authors.initials: I
authors.lastname: Pagano
authors.forename: Anna Lisa
authors.initials: AL
authors.lastname: Piccinelli
authors.forename: Luca
authors.initials: L
authors.lastname: Rastrelli
authors.forename: Carlo
authors.initials: C
authors.lastname: Crescenzi
mesh_terms: D001628:Beverages / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid; D054802:Molecular Imprinting; D010636:Phenols / Q000032:analysis / Q000302:isolation & purification*; D000077185:Resveratrol; D052616:Solid Phase Extraction / Q000295:instrumentation / Q000379:methods*; D013267:Stilbenes / Q000032:analysis / Q000302:isolation & purification*; D014920:Wine / Q000032:analysis*
chemical_list: D010636:Phenols; D013267:Stilbenes; D000077185:Resveratrol