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

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

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

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

Synthesis, characterization, and crystal structures of n-alkyldiorganodithiophosphates RS2P(OC6H4)2

Construction and Evaluation of a Gold Tubular Electrode for Flow Analysis: Application to Speciation...

Determination of tetracyclines in milk samples by magnetic solid phase extraction flow injection ana...

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

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

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

Chemical studies of anthocyanins: A review