Analysis of buprofezin residues in vegetables. Application to the degradation study on eggplant grown in a greenhouse

• Published in: Journal of agricultural and food chemistry Vol. 41; no. 12; pp. 2319 - 2323
• Main Authors: Valverde-Garcia, A, Gonzalez-Pradas, E, Aguilera-del Real, A
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 01.12.1993
• Subjects: ALIMENTOS; AUBERGINE; BERENJENA; Biological and medical sciences; CAPSICUM ANNUUM; CHROMATOGRAPHIE EN PHASE GAZEUSE; CONTAMINACION; CONTAMINATION; CROMATOGRAFIA DE GASES; CULTIVOS DE INVERNADERO; Food industries; Fruit and vegetable industries; Fundamental and applied biological sciences. Psychology; HORTALIZAS DE FRUTO; INSECTICIDAS; INSECTICIDE; LEGUME FRUIT; PHASEOLUS VULGARIS; PLANTE DE SERRE; PRODUIT ALIMENTAIRE; RESIDU; RESIDUOS; Solanum melongena; Gas chromatography; Insecticide; Eggplant; Residue; Quality control; Greenhouse; Vegetable
• ISSN: 0021-8561; 1520-5118
• DOI: 10.1021/jf00036a019

Three different multiresidue methods (the Mills, Luke, and Leary methods) have been assessed for their extraction of buprofezin residues from peppers, beans, and eggplants. Recovery studies were carried out on fortified samples, using capillary gas chromatography with nitrogen-phosphorus detection for buprofezin analysis in the vegetable extracts. Recoveries of greater than 81% with standard deviations of less than 11% were obtained in all instances, but the Leary procedure was more efficient than the Mills and Luke methods. On the other hand, residue levels and the degradation rate of buprofezin in eggplants grown in a commercial greenhouse have also been studied. Buprofezin residues were extracted by the Leary method, analyzed by GC-NPD, and confirmed by GC-FPD. The degradation rate constant and the half-life period obtained for buprofezin in eggplants were, respectively, 0.15 days-1 and 4.6 days