Ion selective electrode and indicator electrode Ion selective electrode (PF-1 type fluoride ion electrode, ion selective electrode, PCL-1 type chloride ion electrode, 6801 sodium ion electrode, PNH3-1 type ammonia gas sensing electrode, PCa- Type 1 calcium ion electrode, PBF4-1 type fluoborate electrode, PNO3-1 type nitrate ion electrode, PI-1 type iodide ion electrode, PCN-1 type cyanide ion electrode, PBr-1 type bromide ion electrode, PAg/ The S-1 type silver sulfide ion electrode, the PCu-1 type copper ion electrode, the PK-1 potassium ion electrode, and the domestic ion selective electrode) are electrochemical sensors that measure the activity or concentration of ions in a solution using a membrane potential. When it is in contact with a solution containing a test ion, a membrane potential directly related to the activity of the ion is generated at the interface between its sensitive membrane and the solution. Ion-selective electrodes differ from classical electrodes in which the electrode potential is the redox potential; whereas the former's membrane potential is generated by the ion exchange equilibrium at the electrode membrane surface.
The indicator electrode refers to the (N-type PT electrode, 216-type silver electrode) electrode that reacts to the half-reaction ion activity or the ionic state of the different oxidation state ions in the solution to generate a Nernst response, which determines the cell's electromotive force. Or in the case of an applied voltage, the current flowing through the electrolytic cell is measured to know the concentration of a certain ion in the solution. The commonly used indicator electrodes are mainly divided into two major categories of metal electrodes and membrane electrodes. ,
The indicator electrode refers to the (N-type PT electrode, 216-type silver electrode) electrode that reacts to the half-reaction ion activity or the ionic state of the different oxidation state ions in the solution to generate a Nernst response, which determines the cell's electromotive force. Or in the case of an applied voltage, the current flowing through the electrolytic cell is measured to know the concentration of a certain ion in the solution. The commonly used indicator electrodes are mainly divided into two major categories of metal electrodes and membrane electrodes. ,