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

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

Synthesis and crystal structures of cis-palladium(II) and cis-platinum(II) complexes containing dipy...

Development of a Polypyrrole Selective Membrane For The Potentiometric Quantification of Saccharinat...

Construction and Evaluation of a Gold Tubular Electrode for Flow Analysis: Application to Speciation...

Presence and antimicrobial resistance of Escherichia coli isolated from foodstuffs in Hidalgo State ...

Prevalence and Antimicrobial Resistance Patterns of Salmonella from Different Raw Foods in Mexico

Potentiometric quantification of saccharin by using a selective membrane formed by pyrrole electropo...

Estudio de las Interacciones Ácido Húmico-Metales Pesados y Determinación de sus Constantes de Estab...

Chemical studies of anthocyanins: A review

Kinetics of Polypyrrole Films Doped with Sulphate Ions Electrodeposited Over Graphite - Epoxy Resin ...