Strontium ion selective electrodes – preparation and applications

A heterogeneous precipitates have been used as ion carriers for the preparation of strontium (II) selective membrane sensor. The electrodes give near–Nernstian responses in linear concentration range of 1M to 1x10-5M with detection limits of the order of 10-5M . The stable potentiometric signals are obtained within a short time period of 15 seconds and stable upto 3 month. The effect of pH, and the effect of medium have been studied found to give a better response. Selectively coefficient values were evaluated using fixed interference method. The sensor was used for the determination of strontium ion in some real samples.