Copper-Selective PVC Membrane Sensor

Spectroscopic study in acetonitrile solution shows a selective interaction between 1-(2-hydroxybenzylidene) thiosemicarbazide (L) and copper cation in comparison with other inorganic metal ions. Thus, L was then used as a good sensing material in copper selective PVC membrane sensor. The proposed potentiometric sensor showed a stable potential response to Cu2+ ions with Nernstian slope of 28.6 +/- 0.4 mV decade(-1) over a wide linear concentration range of 1.0x10(-5)-1x10(-1) mol L-1. The sensor was found to have a short response time of about 25 s and have an acceptable life time. Application of the proposed sensor in analysis of copper content of some water samples showed good results.