Microextraction in Packed Sorbent for Determination of Sulfonamides in Egg Samples by Liquid Chromatography and Spectrophotometric Detection
نویسندگان
چکیده
O presente trabalho descreve a aplicação bem sucedida da microextração em sorvente empacotado e cromatografia líquida com detecção de arranjo de diodos (MEPS/LC-DAD) para a determinação simultânea das sulfonamidas (sulfacetamida, sulfadiazina, sulfatiazol, sulfametazina sulfametoxipiridazina e sulfametoxazol) em amostras de ovos. As variáveis MEPS (pH da amostra, número de ciclos aspirar/dispensar, força iônica e procedimento de dessorção) foram otimizados para aumentar a sensibilidade analítica do método. O método apresentou linearidade na faixa de concentração de 30 ng g (limite de quantificação, LOQ) a 300 ng g. Este valor de LOQ é inferior ao limite máximo de resíduo (LMR) preconizado para sulfonamidas em amostras de ovos (100 μg kg). As taxas de recuperação foram adequadas para todos os analitos (> 94%), bem como os dados de precisão inter-ensaio, com coeficientes de variação inferiores a 10%. Com base na validação analítica, a metodologia MEPS/LC é adequada para a determinação de sulfonamidas em amostras de ovos.
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