GAS-CHROMATOGRAPHIC DETERMINATION OF CYPRODINIL, FLUDIOXONIL, PYRIMETHANIL, AND TEBUCONAZOLE IN GRAPES, MUST, AND WINE

A rapid and simple gas chromatographic method for determinating cyprod inil, fludioxonil, pyrimethanil, and tebuconazole in grapes, must, and wine is described. An on-line microextraction method was used with a one-step extraction-partition procedure. Nitrogen-phosphorus and mass spectrometric detectors were used, because of their low sensitivity an d high selectivity. Because of high selectivity of detector, no cleanu p was necessary and the extract was concentrated 5 times. Recoveries f rom fortified grapes, must, and wine ranged from 93 to 110%. Limits of determination were 0.05 mg/kg for cyprodinil and pyrimethanil and 0.1 0 mg/kg for fludioxonil and tebuconazole.