-
4 years, 8 months ago
payrasbeaso posted an update
CS9001 Non-aqueous Ag/Ag+ reference electrode is used in the organic system. It consists of a Teflon cap with a Ag wire, a glass tubing, and a porous glass tip sealed to the glass tubing with Teflon heat shrinkable tubing.
4mm/6mm refer to the diameter of the tube. In above picture, it’s the size of 4mm non aqueous Ag/Ag+ reference electrode. 4mm is preferred by a lot of customers.
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 10mM. 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 onto 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, the porous tip needs to be resealed. Empty the glass tubing. Use a hear gun and apply the hot air(as hot as possible) to the transparent heat shrinkable tubing, 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.
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 will leak and dry out. The porous tip may also be damaged. When the Non aqueous Ag/Ag+ reference electrode is not in use, please leave the porous tip in the solvent.We can also supply Ag/AgCl reference electrode, saturated calomel electrode, Hg/HgO electrode, Mercury/Mercurous Sulfate Electrode(for acid solution), Cu/CuSO4 reference electrode etc.low cost Reference Electrode
website:http://www.csechem.com/electrochemical-accessories/reference-electrode/