Potentiometric Sensor for Furosemide Determination in Pharmaceuticals, Urine, Blood Serum and Bovine Milk
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Data
2009-01-01
Autores
Santini, Alberto O. [UNESP]
Pezza, Helena Redigolo [UNESP]
Sequinel, Rodrigo [UNESP]
Rufino, Jose L. [UNESP]
Pezza, Leonardo [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Soc Brasileira Quimica
Resumo
The construction, evaluation and analytical application of a potentiometric sensor, namely, Pt vertical bar Hg vertical bar Hg(2)(Fur)(2)vertical bar Graphite, where Fur stands for 4-chloro-N-furfuryl-5-sulphamoyl-anthranilate ion, are described. This electrode has a linear dynamic range between 5.0 x 10(-7)-1.0 x 10(-2) mol L(-1) with a near-Nernstian slope of (-58.4 +/- 0.9) mV decade(-1) and a detection limit of 3.8 x 10(-7) mol L(-1). The potentiometric response is independent of the pH of the solution in the pH range 7.0-9.0. The electrode shows easy construction, low-cost, fast response time (within 10-20 s) and can be used for a period of 6 months without significant change in its performance characteristics. The proposed sensor displayed good selectivities over a variety of other anions (carboxylates and inorganic anions). Application of this potentiometric sensor for the furosemide determination in pharmaceuticals, urine, blood serum and commercial milk samples is reported.
Descrição
Palavras-chave
4-cloro-N-furfuryl-5-sulphamoylanthranilate-sensitive electrode, potentiometry, pharmaceuticals, urine, human blood serum, bovine milk
Como citar
Journal of The Brazilian Chemical Society. São Paulo: Soc Brasileira Quimica, v. 20, n. 1, p. 64-73, 2009.