Thamarai Selvi, J2017-11-082017-11-0820172313-8036https://ir.avinuty.ac.in/handle/avu/3613A new, efficient Calcium ion selective electrode has been prepared using acyclic polyether based ionophore. The prepared ionophore is characterized by UV, FT-IR, XRD. Electrochemical impedance spectroscopy (EIS) technique is also employed to study the electrochemical & surfacereactions. The sensor exhibits a near Nernstian response for Ca(II) ion over a concentration range of 1.0 X 10"'M tol.O M. The proposed sensors revealed relatively good selectivity and high sensitivity for Ca(II) over a mono and divalent cations. It can be used with in the pH range of 3.42 to 6.24. The effect of medium and the selectivity coefficient values was evaluated using fixed interference method found to give a better response. The influence of temperature on electrode potential was studied & it can be used in the determination of thermodynamic functions like AG, AH& AS. It was also successfully used in the analysis of concentration of Calcium ion in various real samples.