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These compact, glass-bodied reference electrodes are available in two styles. The 7.5 cm long RE-5B reference electrode (3 M NaCl or 3 M KCl fill available) is used for voltammetry and polarography experiments using the C-3 Cell Stand, the CGME Controlled Growth Mercury Electrode, the RDE-1 and RDE-2 Rotating Disk Electrodes, and the LCM Low Current Module. The RE-6 reference electrode (3 cm) is used with the CC-5 Cross-Flow Thin-Layer Flow Cell. The RE-4 is also 3 cm long. All electrodes have a 6 mm OD glass body, and use a porous junction (frit) made from either ceramic (RE-4, RE-6) or CoralPor™ (RE-5B). (Note that, due to the high resistance of the ceramic frit, the RE-6 electrode is only recommended for aqueous electrolytes.)
Connection to the cell lead is via a gold-plated pin on the end of a flexible plastic-coated wire (RE-5B and RE-6) or stainless steel pin (RE-4). An O-ring is included with each electrode. Between uses, reference electrodes should be stored with junction tips in a MF-5275 vial filled with 3 M NaCl. A double junction reference electrode can be set up using an RE-5B reference electrode with the glass chamber MF-2030. This chamber also has a CoralPor™ frit, which must be maintained.
MF-2052 | RE-5B Ag/AgCl (3 M NaCl) Reference Electrode with Flexible Connector |
MF-2056 | RE-5B Ag/AgCl (3 M KCl) Reference Electrode with Flexible Connector |
MW-2030 | RE-6 Reference Electrode with Flexible Connector for Electrochemical Flow Cell |
MW-2021 | RE-4 Ag/AgCl Reference Electrode for Electrochemical Flow Cell |
MF-2062 | Non-Aqueous Reference Electrode Kit*** |
This kit contains the parts required for construction of a non-aqueous silver/silver ion reference electrode. The glass electrode body has a porous CoralPor™ tip attached with heat shrink tubing. The removable Teflon top contains a silver wire and 0.060 ” gold-plated connecting pin for the cell lead. The kit also contains solid silver nitrate, extra heat shrink tubing, and extra porous CoralPor™ tips. Non-aqueous solvents must be supplied by the user. An instruction sheet illustrates easy assembly.
MF-2030 | Double-Junction Reference Electrode Chamber |
MF-2064 | Porous CoralPor™ Tips, 1/8″ long (5/pk) with 1/2″ lengths of Teflon heat shrink (6/pk) |
MF-2042 | Glass Tube with Porous CoralPor™ Tip |
MF-2017 | Silver Wire, 0.5 mm dia., 12″ (30 cm) long- 99.9% purity |
MF-2027 | Teflon Heat Shrink Tubing, ~4 mm OD x 30 cm |
MF-2044 | O-ring, 1/4″, 12/pk. |
MR-3608 | PEEK Reference Electrode Retainer |
MF-2022 | RE-4 Bushing, 10/pk. |
MF-2023 | O-Ring for Non-aqueous solvent, RE-4 and RE-6 |
MR-1245 | O-Ring for Non-aqueous solvent, RE-4 a |
MF-2030 | Double-Junction Reference Electrode Chamber |
MW-1085 | Non-aqueous Reference Electrode: Glass tube with CoralPor™ Tip and Cap with Silver Wire |
MF-2042 | Glass Tube Porous CoralPor™ Tip, 6 mm OD 7.5 cm long |
MF-2064 | Porous CoralPor™ Tip, 1/8″ long (5/pk) wtih 1/2″ lengths of Teflon heat shrink (6/pk) |
CF-1060 | Silver Nitrate 1 g |
What properties are required for a reference electrode?
What are liquid junction potentials, and how do they affect measured potentials?
What factors can affect the potential of a reference electrode?
How do I store reference electrodes?
Can I use aqueous reference electrodes for non-aqueous solutions?
“Practical Problems in Voltammetry 3: Reference Electrodes for Voltammetry”, A.W. Bott, Current Separations, 14 (1995) 64.
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