Abstract:

Strawberries, fruits of the family Rosaceae (Fragaria vulgaris L), grown in Morocco in the regions of Souss, Gharb and Loukkos, are widely consumed because of their high vitamin content (C, B1, P and PP) and in mineral salts. This crop is very sensitive to parasites which requires treatments with pesticides to preserve the crop. Our job is to develop a new analytical method based on the extraction of pesticide residues from strawberries samples and their GC-MS assay. The sample preparation consists of crushing the fruit and weighing 10 g for extraction by the QuECHERS method and 3 μl of the extract are injected into the GC-MS. The recovery percentage of this method is 87.5%, the detection limits are 10 PPB and the linearity repetition coefficient is greater than 0.99. 17 samples taken on the market were analyzed by this method, the results showed that a sample is positive in Mepanipyrim.