The silver-silver ion (Ag/Ag+) electrode is a commonly used reference electrode. It is suitable for electrochemical determination of samples in organic solvents.

Enclosed is a non-aqueous Ag/Ag+ reference electrode. It consists of a Teflon cap with a Ag wire, a glass tubing with filter core.

You need to fill the compartment (the glass tubing) with Ag+ solution. Dissolve AgNO3 (not include) together with the supporting electrolyte in the organic solvent you work with. The concentration of Ag+ is typically 10 mM. Use a syringe to fill this solution into the glass tubing. The solution level should be no more than 2/3 of the tubing volume. Tap the tubing and make sure that no air bubble is trapped in the bottom of the tubing. Slowly insert the glass tubing into the cap with Ag wire and you obtain a non-aqueous reference electrode.

When you insert the tubing into the cap, the solution in the tubing should not leak at the porous tip. If this does occur, t，refill the Ag+ solution and insert the tubing into the cap again.

The concentration of Ag+ solution can be other values. The potential of the reference electrode versus the Standard Hydrogen Electrode (0.0V) can be calculated from the activity (not concentration) of Ag+ ion according to:

The solution in the compartment is refillable. Please check the solution level in the glass tubing once a while. If the solution level is too low, you should refill the glass tubing with Ag+ solution. To do that, carefully unplug the Teflon cap and follow the instructions given above.

After you fill the reference electrode compartment, you have to make sure not to expose the porous tip to the air. Otherwise the solution in the glass tubing with leak and dry out. The porous tip may also be damaged. When the electrode is not in use, please leave the porous tip in the solvent.

Specification:
tube diameter: 4 mm
effective length: 50 mm
liquid junction core: microporous ceramic filter core
filling solution: 0.01M AgNO3 and 0.1M TBAP in acetonitrile
potential stability: <5 mV
operating temperature: 0-75 degrees Celsius

Different research systems can choose different reference electrodes:
Neutral system------saturated calomel electrode or Ag/AgCl reference electrode
Alkaline system-----Hg/HgO reference electrode
Acidic system-------Hg/Hg2SO4 reference electrode
Non-aqueous system--Non aqueous Ag+ reference electrode

Product Includes:
1 * Ag/Ag+ reference electrode with gold-plated pin
1 * cap
1 * fluorine rubber O-ring