Determination of bisphenol A, its chlorinated derivatives and structural analogues in vegetables by focussed ultrasound solid-liquid extraction and GC-MS/MS
Environmental Chemistry, ISSN: 1448-2517, Vol: 17, Issue: 3, Page: 266-277
2020
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Article Description
In this work, a sensitive, selective, fast and easy-to-perform method has been developed, based on focussed ultrasound solid-liquid extraction (FUSLE) and dispersive solid-phase extraction (d-SPE), for the multiresidue determination of bisphenol A (BPA), its chlorinated derivatives (Cl-BPA) and six structural analogues (S, F, E, B, P, AF) in vegetables. Determination was carried out by gas chromatography-tandem mass spectrometry (GC-MS/MS). A Box-Behnken design was used to optimise the most significant variables. Recoveries in the range from 74 to 105 %, precision (relative standard deviation) lower than 12 % and limits of quantification in the range from 0.05 to 1 ng g d.w. (dry weight) were achieved. The method was successfully applied to the determination of the compounds in carrot, turnip and potato samples purchased from a local market. BPA and Cl-BPA were found in most of the analysed samples at concentrations up to 8.91 ng g d.w. The analytical and operational properties of the method make it appropriate to be applied in food monitoring programs.
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