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

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...

cis-Palladium(II) complexes of derivatives of di-(2-pyridyl)methane: Study of the influence of the b...

Chemical studies of anthocyanins: A review

Determination of primary amino acids in wines by high performance liquid magneto-chromatography

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

Design and Construction of Solid State Ag/AgCl Reference Electrodes Through Electrochemical Depositi...

Nucleation and Growth Kinetics of Electrodeposited Sulfate-Doped Polypyrrole: Determination of the D...

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

Potentiometric Behavior of Diverse Polypyrrolesulphate Films Electro Synthesized on Graphite Epoxy ...