Non-Aqueous Reference Electrode Kit - 1006.
The Universal 9 glass body with a banana jack is our standard and is always in stock.
Contains:
One non-chloridized silver wire electrode: Removable red top cap, electrode tube assembly, electro-porous K.T. glass tip, belch hole with closure.
Vial (1006VG) contains: 1 gram Silver Nitrate powder
(Serial number #1006-VG)
Packaged inside press seal bag, pink foam, and mailer carton with S.D.S.
PLEASE NOTE: NO LIQUID. Customer is to supply solvent.
I need to use an anhydrous electrolyte, so an aqueous reference electrode is not suitable. What are the alternatives?
If contamination by water from aqueous electrodes is a problem, there are several alternatives. The simplest is to use a salt bridge (Koslow Part No. S.B.) containing the anhydrous electrolyte to separate the aqueous reference electrode from the analyte solution. Other alternatives include using a non-aqueous reference. The Koslow non-aqueous reference electrode (Part No 1006) requires user assembly, and consists of a silver wire immersed in a solution containing silver nitrate dissolved in a solution of an appropriate electrolyte. Ideally, this electrolyte is the same as that used for the analyte (to eliminate junction potentials), an acetonitrile-based electrolyte can generally be used. The potential of the non-aqueous reference electrode depends on the solvent, the electrolyte, and the concentrations of silver nitrate and salt. Since the potential of a non-aqueous reference electrode can vary among different electrodes, redox potentials measured using such a reference electrode should be quoted relative to an internal reference compound (e.g., ferrocene). A pseudo-reference electrode is simply a platinum or silver wire immersed in the analyte solution. This has the advantage that there can be no contamination of the analyte, but the disadvantage is that the reference potential is unknown, as it is dependent on the composition of the analyte solution. Therefore, redox potentials measured using a pseudo-reference electrode should again be quoted relative to an internal reference compound such as ferrocene.
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