Reference Electrodes

These compact, glass-bodied reference electrodes are available in two styles. The 7.5 cm long RE-5B reference electrode is used for voltammetry and polarography experiments using the C-2 and C-3 Cell Stands, the CGME Controlled Growth Mercury Electrode, the RDE-2 Rotating Disk Electrodes  The RE-6 reference electrode (3 cm) is used with the Flow Cells. 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.) Both electrodes can be used to suspend three reference electrodes in the salt solution while protecting the connecting pins and wires from corrosion. 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 3M 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.

Silver/Silver Chloride (Ag/AgCl) Reference Electrodes

MW-2021 RE-4 Ag/AgCl Reference electrode,
MF-2022 RE-4 Bushing, 10/pkg.
MF-2023 O-Ring for RE-4 and RE-6, 10/pkg.
MR-1245 O-Ring for Non-aqueous solvent, RE-4 and RE-6
MF-2052 RE-5B Ag/AgCl Reference Electrode with Flexible Connector
MW-2030 RE-6 Reference electrode with Flexible Connector
MR-5275 Storage vial for Ag/AgCl reference electrodes (Aqueous only)
MF-2042 Glass tube with porous CoralPor™ tip
MF-2030 Double-junction reference electrode chamber
MF-2064 Porous CoralPor™ Tips 1/8″ long (5/pkg.) with 1/2″ lengths of Teflon heat shrink (6/pkg.)
MF-2027 Teflon heat shrink tubing, ~4mm OD x 30cm
MF-2044 O-ring, 1/4″, 12/pkg
MR-3068 PEEK Reference Electrode Retainer

Saturated Calomel Reference Electrode (SCE) Kit

This reference electrode comes in kit form and requires user preparation. The kit includes a glass electrode body in the “H ” design with a porous CoralPor™ frit and a platinum wire electrode lead. Vials containing saturated KCl solution and calomel paste are provided (please note that mercury is NOT provided, and must be obtained from an alternative source). An instruction sheet illustrates assembly. The user will need glass pipettes, a pipette bulb, and clean mercury for assembly. Once assembled, the electrode must be maintained in a stable, upright position, with the CoralPor™ tip continuously wetted. The electrode should be stored with the tip immersed in a saturated KCl solution.

MF-2055 Calomel Reference Electrode Kit
MW-9070 Potassium Chloride solution – 5 mL
MW-9072 Calomel Paste – 2.5 g
MF-2064 Porous CoralPor™ Tips 1/8″ long (5/pkg.) with 1/2″ lengths of Teflon heat shrink (6/pkg.)

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-2062  Non-aqueous Reference Electrode Kit
 MF-2042  Glass tube with porous CoralPor™ tip, 6mm OD 7.5cm long
 MW-1085  Non-aqueous reference electrode: Glass tube with CoralPorTM tip and cap with Ag wire
 MF-2064  Porous CoralPor™ Tips 1/8″ long (5/pkg.) with 1/2″ lengths of Teflon heat shrink (6/pkg.)
 CF-1060  Silver Nitrate – 1 g

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