Thamarai selvi, J2017-02-172017-02-172010https://ir.avinuty.ac.in/handle/avu/1483A heteroueneous precipitate have been as ion carriers tor the preparation of urea and oxalic acid selective membrane sensor. The electrodes gisc near-Nemstian response in the linear concentration range of IM to lx 10"’ M \'.iih detection limits of the orders of 10 ' M. The stable potentiometric signals are obtained \sith in a short time period of 3 seconds. I’he effect ofp H and th'e effect of medium ha\e been studied, found to give a better responses selectivits coefficient \alues K K (log urea )and(log Nitric acid ) esaluated using fixed interference method. I'he sensors luise also been used as urea determination m fertilizers