Producción Científica Profesorado

Potentiometric quantification of saccharin by using a selective membrane formed by pyrrole electropolymerization



Rodríguez Ávila, José Antonio

2010

Álvarez-Romero, G.A., Lozada-Ascencio, S.M., Rodríguez-Ávila, J.A., Galán-Vidal, C.A., Páez-Hernández, M.E. Potentiometric quantification of saccharin by using a selective membrane formed by pyrrole electropolymerization, Food Chemistry, 2010, Vol. 120, p. 12501254, ISSN 0308-8146


Abstract


A selective membrane for direct quantification of saccharinate ion based on a polypyrrole-doped membrane is developed. The membrane is electrochemically prepared using stainless steel as working electrode. Potentiostatic variables for membrane growing such as pyrrole concentration, saccharinate concentration, applied potential and deposition time are optimized in order to maximize sensitivity. The optimized membrane was analytically characterized by means of calibration curves, the detection limit was found to be 3.6 × 10?4 mol L?1 and the quantification limits were found between 5 × 10?4 mol L?1 and over 1 mol L?1. Selectivity of the membrane is evaluated for different inorganic anions, resulting in the following selectivity coefficients: pKSaccharinate,Citrate = 3.4, pKSaccharinate,H2PO4 = 3.4, and .These results demonstrate an adequate performance of the proposed selective polypyrrole membrane so it can be considered as an alternative to traditional analytical methods for the direct quantification of saccharin in diverse samples.



Producto de Investigación




Artículos relacionados

Sequential Injection Spectrophotometric Determination of Diclofenac in Urine and Pharmaceutical Form...

Development of a Chloride Ion-Selective Solid State Sensor Based on Doped Polypyrrole-Graphite-Epoxy...

Simultaneous determination of tetracyclines in poultry muscle by capillary zone electrophoresis

Characterization of Main Anthocyanins Extracted from Pericarp Blue Corn by MALDI-ToF MS

Influence of the Cation Nature of the Sulphate Salt on the Electrochemical Synthesis of Sulfate-Dope...

Development of a Chloride Ion-Selective Solid State Sensor Based on Doped Polypyrrole-Graphite-Epoxy...

Determination of non-steroidal anti-inflammatory drugs in wastewaters by magnetic matrix solid phase...

Silver and Silver Chloride Electrodeposits, an Alternative in the Construction of Ag/AgCl Solid Elec...

Electrochemical and AFM characterization of the electropolimerization of pyrrole over a graphiteepox...

Potentiometric behavior of graphite-epoxy electrochemical transducers towards anions, cations and pH...