Journal of the Chilean Chemical Society
versión On-line ISSN 0717-9707
MASROURNIA, MAHBOBEH et al. A SILVER(I) PVC-MEMBRANE SENSOR BASED ON SYNTHESIZED DILAKTAM CROWN ETHER. J. Chil. Chem. Soc. [online]. 2009, vol.54, n.1, pp.63-67. ISSN 0717-9707. http://dx.doi.org/10.4067/S0717-97072009000100015.
In this work, we introduce a highly selective and sensitive silver(I) PVC-membrane sensor. Dilaktam Crown ether (DLCE) was used as a membrane-active component to prepare a highly sensitive Ag(I)-selective polymeric membrane electrode. This sensor illustrated very good selectivity and sensitivity towards silver ions over a wide variety of cations, including alkali, alkaline earth, transition and heavy metal ions. The sensor exhibited a Nernstian behavior (with a slope of 59.8 ± 0.2 mV per decade) for a concentration range (1.0 x 10-5-1.0 x 101 M) with a detection limit of 6.8xl0-6 M. It displayed a response time in the whole concentration range (~20 s) and its usage exceeded a 75 days period in the pH range of 5.1-7.2. The proposed electrode application was found to be successful as an indicator electrode in the titration with NaCl.
Palabras clave : Dilaktam Crown ether; Silver; sensor; PVC Membrane; Ion-selective electrode; Potentiometry.