Evaluation of different aroylthioureas as ionophores in sensor of lead (II)

Authors

  • Dr. C. Ana R. Lazo-Fraga Universidad de La Habana, La Habana
  • Aimée Vasconcelos-Pacheco Universidad de La Habana, La Habana
  • Dr. C. Alicia Díaz-García Universidad de La Habana, La Habana
  • MSc. Marcia Bustamante-Sánchez Universidad de La Habana, La Habana
  • Dr. C. Osvaldo Estévez-Hernández Universidad de La Habana, La Habana

Abstract

A solid state electrodes for potentiometric determination of Pb(II) ions were constructed. For this purpose PVC membranes that contained disubstituted aroylthiourea as ionophore were employed. When 1-furoyl-3,3-diethylthiourea and 1-benzoyl-3,3-diethylthiourea were use in the electrode have a logarithmic relationship of the Nernst type. In both case, the linear rage are between 10-6-10-3 mol /L and also were observed a good sensitivity to Pb(II) ion, and a detection limits of 10-6 mol / L. These devices have lower response times than 20 seconds and lifetimes of 30 and 90 days, respectively. In both electrodes, Cu(II), Hg(II), Ag(I) are interferences. The Cd(II) cation is an interference in a lesser extent.

Keywords: ion selective electrode Pb (II), 1-furoyl-3,3-diethylthiourea and 1-benzoyl-3,3-diethylthiourea.

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Published

2015-10-30

How to Cite

Lazo-Fraga, D. C. A. R., Vasconcelos-Pacheco, A., Díaz-García, D. C. A., Bustamante-Sánchez, M. M., & Estévez-Hernández, D. C. O. (2015). Evaluation of different aroylthioureas as ionophores in sensor of lead (II). Revista Cubana De Química, 27(3), 262–274. Retrieved from https://cubanaquimica.uo.edu.cu/index.php/cq/article/view/241

Issue

Vol. 27 No. 3 (2015)

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Artículos

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