Sorption of metal ions on acrylamidezirconium(IV) arsenate and its synthesis of PVC based lead(II) selective electrode

The adsorption of different metal ions on acrylamidezirconium (IV) arsenate has been studied. The effect of surfactant concentration (Tween 80-R and Tritron X-100) on sorption of different metal ions acrylamidezirconium (IV) arsenate was explored. The effect of experimental parameters such as contact time, temperature, and pH on adsorption of Pb2+ ions was studied. The promising feature of the material is its specificity for Pb2+ ions. A new PVC based Pb2+ ion-selective electrode using acrylamidezirconium (IV) arsenate as electro-active material has been fabricated. The electrode works well over a wide range of concentration 1 x 10(-1) M-1 x 10(-7) M with a Nerstian slope of 30 +/- 1 mV per decade. The sensor shows the short response time of 20 seconds and can operate in the pH range of 2-7. The sensor can be used for the period of over 4 months with out deviation in response characteristics. The electrode has been successfully used as an indicator electrode for potentiometric titration of Pb2+ ions in solution against EDTA solution.