Validação intralaboratorial de método multirresíduos para determinação de agrotóxicos em abacaxi empregando QuEChERS e UPLC™- MS/MS

Abstract

Brazil is a major producer of fruits and vegetables, known worldwide as global breadbasket. Agricultural production is completely traditional, following the mold of the green revolution that began after World War II, whose principles the use of external inputs property (fertilizers, pesticides, machinery, etc.). Besides being a major producer country stands as the largest consumer of pesticides, which creates a major concern due to contamination by excessive use. The Ministry of Health through the Program for the Analysis of Pesticide Residues in Foods has identified the presence of prohibited substances in Brazil and / or cultures studied, and concentrations above the Maximum Residual Limit - MRL. The aim of this study was to house validation methodology for multiresidue pesticides in the matrix of 42 Pineapple Ananas comosus, apply the methodology validated in samples of WM of-RJ and confirm the results. Was validated 29 pesticides which are: acephate, ametrina, atrazine, carbaryl, carbendazim, demeton-S-methyl, dichlorvos, dimethoate, diuron, spinosad A and D, etiona, imidacloprid, malathion, metalaxyl, methamidophos, myclobutanil, omethoate, piperonyl butoxide, pyriproxyfen, propoxur, tetraconazol, thiabendazole, thiamethoxam, triadimefom, triadimenol, triazophos, tricloforn, triflumizole. I was able to validate the 9 allowed pesticides in pineapple crop, 5 active ingredients not allowed, but often found in analyzes of the TO and 15 which are degradation products or pesticides allowed in other countries. Of the 10 samples analyzed showed all residues carbendazim is not approved for culture. In both samples the concentrations of carbendazim were high (7.76 and 9.42 mg.kg-1) indicating the error handling control fitossantário that confer high risk of contamination to the consumer and farm worker. The results were confirmed using the criteria of DG-SANCO, 2012. Unauthorized waste are indicative of a lack of technical and non-adoption of good agricultural practices.