Otimização, validação e aplicação de método para determinação da concentração residual de difenoconazol em morangos após múltiplas aplicações

• Autor(a) principal: Heleno, Fernanda Fernandes
• Data de Publicação: 2013
• Outros Autores: Queiroz, Maria Eliana Lopes Ribeiro de, Neves, Antônio Augusto, Oliveira, André Fernando de
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://dx.doi.org/10.1590/S0100-40422014000100025; http://www.locus.ufv.br/handle/123456789/18019
• topic: Pesticide analysis; Strawberry; Gas chromatography

Difenoconazole residues in strawberry fruit cultivated in pots were estimated using the solid-liquid extraction with low temperature partition (SLE/LTP) method for sample preparation and gas chromatography with electron capture detection (GC/ECD) for analysis. The optimized method presented excellent recovery values from fortified samples and reproducibility (average recovery values ≥ 98%; CV values < 15%). Linearity of response was demonstrated (r = 0.995) with a detection limit of 9 µg kg-1. The method was successfully applied for the determination of difenoconazole residues in strawberries. Based on these results, the fungicide dissipates quickly, but the residual concentration increases after multiple applications.