Preparation Of Nitrat-Ion selective Eletrode And Providing the Optimum Condition

Study on the nitrate electrode meter the first time in the nineties by Richards Hatchynz and Lyvndas Bachas and San Fych also was performed[1,2]. Read phonetically Selective Electrode Nitrate was made through Electropolymerization of Pyroll on the Platin electrode in the presence of Nitrate salt. In order to increase the selectivity and sensitivity of the electrode, the following variables were optimized: Monomer (pyroll) concentration, concentration of carrier electrolyte, the voltage level in electropolymerization, duration of electropolymerization, pH of electropolymerization solution and condition time of electrode. Moreover the use of Indole monomer and dibutilphetalat plasticizer was studied. In order to optimized the variables the effect of (One at hand the time). On other constants was investigated, that is, the variable was studied while the other factors were constant. The calibration curve was employed to evaluated the electrode functioning. The best slope observed by this electrode was -58.3 mv in the concentration range of 10 ¹M-7.5×10 5 M and the detection limit of this electrode was 5×10 5 Using plasticizes and D.B.P. in making the electrode led to increased durability and selectivity of the electrode. The selectivity rate of this electrode was studed in the presence of ten Anions. This selectivity showed a considerable decrease in the presence of anions such as nitrate.