Producción Científica Profesorado

Development of a Polypyrrole Selective Membrane For The Potentiometric Quantification of Saccharinate Anion



Alvarez Romero, Giaan Arturo

2008

Lozada-Ascencio S. M., Álvarez-Romero G. A.,Rodríguez-Ávila J. A., Galán-Vidal C. A., Páez-Hernández M. E., Development of a Polypyrrole Selective Membrane For The Potentiometric Quantification of Saccharinate Anion, ECS Transactions, 2008, Vol. 15, Núm . 1, ISSN 1938-5862


Abstract


A selective electrode for the 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 sensibility. The optimized membrane was analytically characterized by means of calibration curves, the detection limit was found to be 3.6 x 10-4 M and the quantification limits were found between 5 x 10-4 M and over 1 M. Selectivity of the membrane is evaluated for different inorganic anions, resulting in the following selectivity coefficients: pKSaccharinate,Citrate= 3.4, pKSaccharinate,H2PO4= 3.4, pKSaccharinate,HPO4-2= 3.4 y pKSaccharinate,SO4-2= 2.5. This results demonstrate an adecuate performance of the proposed selective polypyrrole membrane so it can be considered as an alternative to the tradicional analytical methods for the direct quantification of sacarine in diverse samples.



Producto de Investigación




Artículos relacionados

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

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

Potentiometric Behavior of Diverse Polypyrrole-sulphate Films Electro Synthesized on Graphite - Epox...

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

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

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

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

Determination of non-steroidal anti-inflammatory drugs in wastewaters by magnetic matrix solid phase...

Magnetic solids in analytical chemistry: A review

High-performance liquid magneto-chromatography