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

Magnetic solids in analytical chemistry: A review

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

Development of a novel nitrate-selective composite sensor based on doped polypyrrole

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

Validation of a tubular bismuth film amperometric detector: Determination of diclofenac sodium by mu...

Determination of oxytetracycline in milk samples by polymer inclusion membrane separation coupled to...

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

Metal content evaluation and its effect on the stability of anthocyanins

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

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