Producción Científica Profesorado

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



Alvarez Romero, Giaan Arturo

2006

Alvarez Romero G. A., Galán Vidal C., Palomar-Pardavé M. E., Ramírez Silva M. T.Development of a novel composite sensor based on doped pyrrole selective to nitrate ions, ECS Transactions, 2006,Vol. 3, Núm. 10, ISSN 1938-5862


Abstract


In this work the results obtained on the manufacturing andevaluation of a novel sensor built with a composite material,highly selective to nitrate ions using doped polypyrrole as arecognition agent, are presented. When the ratio recognitionagent-graphite was optimized to 1:1 the sensitivities foundclosely approached nernstian behaviour. The response times weresmaller than 20 s. Batch characterization of the sensordisplayed a sensitivity of 57.10 mV/decade of nitrate ionactivity and a detection limit of 5.37 x 10-5 M, which arecomparable to those reported for commercial sensors. Theevaluation of the selectivity coefficients showed high affinityto nitrate ions, superior to that of other commercial sensors.The composite material gives the sensor a prolonged servicelife. Coupling the sensor and a solid state, composite-type,reference electrode to a flow injection analytical system, FIA,permitted to achieve an effective overall assessment of the system.



Producto de Investigación




Artículos relacionados

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

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

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

Metal content evaluation and its effect on the stability of anthocyanins

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

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

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

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...

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