For the extraction of tebuconazole residues in grapes, musts,pomaces and wines, a fungicide multiresidue method, previously developed in our laboratory, was used (Rial-Otero, Cancho-Grande,
& Simal-Gándara, 2003); some modifications were performed to improve the purification process and to reduce the matrix contribution(González-Rodríguez et al., 2008a)