^1,2Avinashilingam Institute for Houme Science and Higher Education for Women Coimbatore Tamil Nadu India

 A conducting polymer have been as ion carriers for the preparation of potassium ion selective membrane sensor. The electrodes give near nernstian responses in the Linear Concentration range of 1 M to 1x10^-2 M with detection limit of the order of 10^-2 M. The stable potentiometric signals are obtained with in a short time period of 10 seconds. The effect of pH and the effect medium have been studied found to give a better response. Selectivity coefficient values K^pot_potassium have been evaluated using fixed interference method. Thermodynamic functions such as DG^o, DH^o and DS^o have also been evaluated. The sensors have also been used as indicator electrode in commercially available products.