Non-Aqueous Electrode Kit. Part No. 1006.
This kit contains the electrode and all the compatible maintenance accessories.
- Carry Case
- No liquid
- Vial of Silver Nitrate
- Laboratory Electrode Storage Bottle
- Pack of 5 Replacement Porous Tips
- 5 Heat-Shrinkable Sleeves
- Electrode Filling Pipette
-
Absorbent Foam
-
Maintenance Manual
Contains:
One non-choridized silver wire electrode: removable top cap, electrode tube assembly, electro-porous KT 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. The customer is to supply solvent.
I need an anhydrous electrolyte, so an aqueous reference electrode is unsuitable. What are the alternatives?
If contamination by water from aqueous electrodes is a problem, there are a number of alternatives. The simplest is to use a salt bridge (Koslow Part No. SB) 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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