PVC Membrane Potentiometric Sensor based on (E)-2-Acetyl-3-(butyl-amino)-N-phenyl buten-2-thioamide for Selective Determination of Iron (II)

In this paper, the construction and performance characteristics of novel pvcmembrane fe(ii) ion selective electrodes based on (e)-2-acetyl-3-(butyl amino)-n-phenylbuten-2-thioamide is described. the electrode exhibits linear responses with nernstian slopeof 30.0±0.2 mvdecade?1 of activity within the fe(ii) ion concentration range of 3.5×10?7 to1.2×10?2 m. this sensor is applicable in a ph range of 5.0-7.0. the lower detection limit is1.6×10?7 m. it has a response time less than 10 s and can be used practically for a period of atleast 2 months without any measurable divergence in results. the isothermal temperaturecoefficient of the sensor was assessed 1.24×10?3 v/oc. the electrode showed excellentselectivity towards fe(ii) ion over a wide range of alkali, alkaline earth, and transition metalsions. it was successfully applied for the direct determination of fe(ii) ions in real samples.