Producción Científica Profesorado

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



Páez Hernández, María Elena

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, 120 (2010) 12501254. http://dx.doi.org/10.1016/j.foodchem.2009.11.072


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

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

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

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

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

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

Evaluación del contenido de metales y su efecto en la estabilidad de antocianinas

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

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

Determination of glucose by flow injection analysis with amperometric detection at Fe(III)-(tris(3,5...

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