Journal of the Chilean Chemical Society
versión On-line ISSN 0717-9707
LAZO, A. R. et al. J. Chil. Chem. Soc. [online]. 2006, vol.51, n.3, pp. 975-978. ISSN 0717-9707. doi: 10.4067/S0717-97072006000300010.
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
Palabras clave : Cadmium (II) electrode; 1-furoyl-3,3-diethyl thiourea; ionophore.