Rapid Measuring of Cu^2+ ions by Selective Potentiometric Sensor based on a New Ion Carrier

In this paper, 2-(4-methyl pyperazine-1-yl methyl)-1-cyano cyclohexanone was synthesized and used as an ion carrier in cu^2+ ion selective sensor. the potentiometric sensor was worked well in a concentration range of 1.0×10^-2 to 1.0×10^-6 m of cu^2+ ions with nernstian slope of 30.7±0.6 mv/decade. workable ph range of the sensor was 3.5-8.5 and the response time of the electrode was about 10 s. detection limit of the electrode was obtained 1.0×10^-6 m. the sensor has a relatively fast response time (∼10 s) and a useful working ph range of 3.5-8.5. the proposed electrode responded to copper ions selectively respect to other common metal cations. performance of the copper electrode as an indicator electrode was checked in a potentiometric titration of cu^2+ ions with edta as titrant which confirmed the monitoring ability of the copper selective sensor. finally, direct determination of cu^2+ ions in some river water samples was done to show the analytical ability of the designed sensor.