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Sulfadiazine-potentiometric sensors for flow and batch determinations of sulfad...
Kamel, Ayman H.; Almeida, Sofia A. A.; Sales, M. Goreti F.; Moreira, Felismina T. C.New PVC membrane electrodes for the determination of sulfadiazine (SDZ) are presented. The electrodes are fabricated with conventional and tubular configurations with a graphite-based electrical contact, and no internal reference solution. The selective membranes consist of bis(triphenylphosphoranilidene)ammonium·SDZ (electrode A), tetraoctylammonium bromide (electrode B), or iron(II)-phthalocyanine (FePC) (ele...
Flow amperometric determination of carbofuran and fenobucarb
Sales, M. Goreti F.; Vaz, M. Carmo V. F.; Delerue-Matos, Cristina; Almeida, Sofia A. A.; Barroso, M. Fátima; Ferreira, Helder A. O.A simple, rapid, and precise amperometric method for quantification of N-methylcarbamate pesticides in water samples and phytopharmaceuticals is presented. Carbofuran and fenobucarb are the target analytes. The method is developed in flow conditions providing the anodic oxidation of phenolic-based compounds formed after alkaline hydrolysis. Optimization of instrumental and chemical variables is presented. Under...
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