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

Simultaneous determination of tetracyclines in poultry muscle by capillary zone electrophoresis

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

Magnetic solid phase extraction based on phenyl silica adsorbent for the determination of tetracycli...

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

Chemical studies of anthocyanins: A review

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

Development of a novel composite sensor based on doped pyrrole selective to nitrate ions

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

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

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