Abstract

J. Thamarai Selvi and S. Lakshmi

A heterogeneous precipitate have been used as ion carriers for the preparation of Zinc (II) selective membrane sensors. This electrode give near-nernstian responses in the linear concentration range of 1 x 10-1 M to 1x 10-4 M with detection limits of the order of ~10-4 M. The stable potentiometric signals are obtained with in a short time period of 9 seconds. The effect of pH and the effect of medium have been studied found to give a better response selectivity coefficient values have been evaluated using fixed interference method. The sensors have also been used as indicator electrodes in potentiometric titrations of Zinc (II) ions with EDTA and its determination in pharmaceutical products.

A Heterogenous precipitate; Zn (II) ion membrane sensors

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