Avaliação de pesticidas em maçãs (Malus Domestica) comercializadas na cidade de Fortaleza

• Autor(a) principal: Silva, Rudson Brendon Cordeiro da
• Data de Publicação: 2017
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Ceará (UFC)
• Texto Completo: http://www.repositorio.ufc.br/handle/riufc/35329
• topic: Pesticidas; QuEChERS; Maçã

Six pesticides were labeled: Kresoxim-methyl, Fenarimol, Deltamethrin, Simazine, Tebuconazole Trifluralin to be evaluated for presence in apples. A literature review determined conditions for the evaluation of these pesticides by gas chromatography coupled to mass spectrometry. Although coelution is not necessarily a problem when a mass spectrometer is used as detector system, the chromatogram of a mixture of pesticides shows that the chromatographic conditions applied promoted their separation. Using the QuEChERS citrate extraction method, an extract of organic apples was evaluated, which proved to be suitable for use to simulate the matrix and through the matrix overlap, calibration curves were constructed. The linearity was evaluated and determination coefficients were obtained in the range of 0.9652 to 0.9971. Regarding the accuracy, a recovery trial showed percentage values in the range of 56 to 131 (%). The use of heptachlor as internal standard was evaluated, with improvement in the determination coefficients obtained. A commercial sample was analyzed and there was no evidence of the presence of selected pesticides, but only after validation of the method would it be safe to make such a statement.