The samples were submitted to a sim

The samples were submitted to a simple clean-up step with poly(vinylpolypyrrolidone)followed by filtration. Electrophoretic separation in a polyvinyl alcohol (PVA)-coated capillary using0.5 mol L−1acetic acid (pH 2.5) as background electrolyte and detection by electrospray-tandem massspectrometry was employed. The range of the correlation coefficients of the calibration curves of theanalyzed compounds was 0.996–0.999, and the limits of detection and limits of quantification were inthe range of 1–2 g L−1and 3–8 g L−1, respectively. The recovery values for samples spiked at three con-centration levels (0.2, 0.5, and 1.0 mg L−1) ranged from 87 to 113% with standard deviation not greaterthan 5.8%. The use of a PVA-coated silica capillary allows suppressing the electroosmotic flow and, conse-quently, increasing of the separation efficiency. The method was successfully used to determine biogenicamines in commercial samples of beer and wine.