Calomel electrode in



Keywords: reference electrodes, saturated calomel, silver/silver chloride, mercury/mercury oxide
Description: Reference electrodes are critical to acquiring good electrochemical data. Gamry has : Saturated Calomel-Silver/Silver Chloride-Mercury/Mercury Oxide

Reference electrodes are critical to acquiring good electrochemical data.  Drift in the reference electrode potential can cause quantitative and qualitative errors in data collection and analysis beyond simple inaccuracies in the measured potential.  High performance potentiostats can also be susceptible to instability if the reference electrode impedance is too high.

Gamry supplies a Saturated Calomel Reference Electrode (SCE, Part No. 930-03), a Silver/Silver Chloride Reference Electrode (Ag/AgCl, Part No. 930-15), a Mercury/Mercurous Sulfate Reference Electrode (Hg/Hg2 SO4. Part No. 930-29), a Mercury/Mercury Oxide Reference Electrode (Hg/HgO, Part No. 932-8) and a Silver/Silver Nitrate non-aqueous reference electrode (Ag/AgNO3. Part No. 930-59). All reference electrodes from Gamry maintain electrical contact with the supporting electrolyte through replaceable Vycor Tips (Part No. 955-03 (package of 5)).  The Vycor Tip provides a nice, low-impedance contact so you won't encounter any noise pick-up.

The Ag/AgCl reference electrode is simpler in construction than the SCE and has a similar potential.  It contains no mercury.

The Hg/HgSO4 Reference Electrode is recommended when chloride ion cannot be tolerated in the electrolyte.  The Hg/HgSO4 reference electrode uses a filling solution of potassium sulfate.




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