Preliminary study of the miniaturization of lead (II) ion selective electrode based on thiourea derivatives

Authors

  • Marcia Viltres-Portales Instituto de Ciencia y Tecnología de Materiales (IMRE), Universidad de La Habana, La Habana, Cuba
  • Ana Rosa Lazo-Fraga Instituto de Ciencia y Tecnología de Materiales (IMRE), Universidad de La Habana, La Habana, Cuba
  • Alicia Díaz-García Laboratorio de Bioinorgánica-Departamento de Inorgánica, Facultad de Química, Universidad de La Habana, La Habana, Cuba
  • Ana María Plutín-Stevens Laboratorio de Síntesis Orgánica, Facultad de Química, Universidad de La Habana, La Habana, Cuba
  • Raúl Ramos-Cairo Laboratorio de Síntesis Orgánica, Facultad de Química, Universidad de La Habana, La Habana, Cuba

Abstract

The present work reports the miniaturization of a solid-contact lead (II) ion selective electrode based on 1-benzoyl-3,3-diethylthiourea (BDE) as neutral carrier and tris-2-ethylhexilphosphate (TEHP) as mediator solvent in a polivynil chloride (PVC) matrix. Microelectrodes were prepared with glass capillaries of different diameters (2, 1 y 0,8 mm) and illustrates a good sensitivity to the metallic cation, with a slope close to a Nernstian logarithmic relationship for a divalent ion (29,53 mV/decade). Furthermore, the microelectrodes shows detection limits in order of 10-6 mol/L and a linearity range from 10-6 to 10-3 mol/L. These results are similar to reports for others sensors based on thiourea derivatives and even for commercial selective electrodes.

Keywords: lead(II)-ion selective microelectrodes, 1-benzoyl-3,3-diethylthiourea.

Downloads

Published

2017-10-06

How to Cite

Viltres-Portales, M., Lazo-Fraga, A. R., Díaz-García, A., Plutín-Stevens, A. M., & Ramos-Cairo, R. (2017). Preliminary study of the miniaturization of lead (II) ion selective electrode based on thiourea derivatives. Revista Cubana De Química, 29(3), 379–389. Retrieved from https://cubanaquimica.uo.edu.cu/index.php/cq/article/view/2946

Issue

Vol. 29 No. 3 (2017)

Section

Artículos

License

This journal provides immediate open access to its content, based on the principle that offering the public free access to research helps a greater global exchange of knowledge. Each author is responsible for the content of each of their articles. 

Most read articles by the same author(s)