Abstract

A. Vijayalakshmi and J. Thamarai selvi

DOI : http://dx.doi.org/10.13005/ojc/330147

A new, efficient Calcium ion selective electrode has been prepared using Surface modified Zeolite based ionophore.The prepared ionophore is characterized by UV,FT-IR,XRD..The sensor exhibits a near Nernstian response for Ca(II) ion over a concentration range of  1.0 X 10^-4 M to1.0 M . The proposed sensors revealed relatively good selectivity and high sensitivity for Ca(II) over a monovalent cations. It can be used with in the pH range of 5.57 to 6.24 . The effect of medium and the selectivity coefficient values was evaluated using fixed interference method found to give a better response. . It was also successfully used in the analysis of concentration of Calcium ion in various real samples.

Calcium (II); Surface modified Zeolite; Potentiometry; Selectivity coefficient

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