Preparation and study of a 1-furoyl-3,3-diethylthiourea electrode

• A. R. Lazo ^[2] ; M. Bustamante ^[2] ; J. Jimenez ^[2] ; M. A. Arada ^[3] ; M. Yazdani-Pedram ^[1]
  1. [1] Universidad de Chile

     Universidad de Chile

     Santiago, Chile

     
  2. [2] University of Havana Institute of Materials Laboratory of Analytical Chemistry
  3. [3] Easter University of Cuba Department of Analytical Chemistry

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• Localización: Journal of the Chilean Chemical Society (Boletín de la Sociedad Chilena de Química), ISSN-e 0717-6309, ISSN 0366-1644, Vol. 51, Nº. 3, 2006, págs. 975-978
• Idioma: español
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  • Cadmium (II) electrode based on plasticized PVC membranes with 1-furoyl-3,3-diethyl thiourea as ionophore and tributylphosphate as plasticizer has been developed. The membrane was applied on a support of conducting epoxy resin. Some parameters of evaluation of the electrode are presented in this work. The constructed electrode showed linear response in the concentration range of 10-6 -10-3 mol/dm³, had a slope of 28.5 mV/decade, a detection limit (DL) of 2.10-6 mol/dm³ and a lower limit of lineal range (LLLR) of 4.2.10-6 mol/dm³. The static response time obtained was less than 20 seconds. The Cd/S relationship in the membrane was 1:1, as was determined by chemical microanalysis of energy dispersive X-ray spectroscopy (EDS). The constructed electrodes had a life-time of 5 days