| Abstract
| - Guazatine is a fungicide used in agriculture to control a wide range of seed-borne diseases of cerealsand other vegetable foods. In this work, a LC-ESI-MS method was developed for the quantitativedetection of guazatine residues in maize and hard wheat. Quantitative data were determined for theresidues of the main diamines, triamines, and tetramines that cover more than 87% of the total contentsof the mixture. The mean recoveries from the fortified cereals at 0.050 mg/kg ranged from 81 to86%, with the coefficients of variation (CVs) ranging from 0.9 to 5.5% (n = 5). At 0.025 mg/kg, therecoveries ranged from 78 to 87%, with the CVs ranging from 0.8 to 6.3% (n = 5). The limitsof quantification have been estimated to be 0.010, 0.004, 0.002, 0.002, 0.005, and 0.002mg/kg, respectively, for GN, GG, GNG, GGN, GGG, and GGGG in maize and hard wheat (S/Nratio >10). Keywords: Residues; cereals; guazatine; fungicide; LC/ESI/MS
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