A novel multicommuted fluorimetric optosensor for determination of resveratrol in beer.
作者： Lucía Molina-García , Antonio Ruiz-Medina , Maria Luisa Fernández-de Córdova
DOI: 10.1016/J.TALANTA.2010.10.033
关键词: Column chromatography 、 Fluorescence spectroscopy 、 Piceid 、 Resveratrol 、 Solid phase extraction 、 Flow injection analysis 、 Chemistry 、 Chromatography 、 Detection limit 、 Standard addition
摘要: Resveratrol (3,5,4'-trihydroxystilbene) is a phytoalexin that plays central role in the human diet because of its antioxidant, anticarcinogenic and antimutagenic properties. This paper shows development multicommuted optosensing device for determination resveratrol beer. The method based on measurement fluorescence (277/382 nm, λ(ex)/λ(em)) photoproduct on-line generated by UV-irradiation resveratrol. fluorescent monitored once it retained solid support (Sephadex QAE A-25) detection area, which improves both sensitivity selectivity. sample was delipidated with toluene cyclohexane extracted solid-phase extraction (SPE) C(18) cartridges, using methanol as eluent. pre-treatment allowed recovering about an 82% removing 3-O-β-d-glycoside (piceid) other interfering substances present provides limit (DL) 1.0 ng mL(-1) linear dynamic range (LDR) 3.3-100 mL(-1). It satisfactorily applied to top- bottom-fermented beers standard addition calibration. concentrations analysed samples varied from 4.1 14.1 first proposed spectroscopic
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