calomel electrode


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Related to calomel electrode: Glass electrode

electrode

 [e-lek´trōd]
either of two terminals of an electrically conducting system or cell; specifically, the uninsulated portion of a lead that is in direct contact with the body.
active electrode therapeutic electrode.
calomel electrode one capable of both collecting and giving up chloride ions in neutral or acidic aqueous media, consisting of mercury in contact with mercurous chloride; used as a reference electrode in pH measurements.
depolarizing electrode an electrode that has a resistance greater than that of the portion of the body enclosed in the circuit.
hydrogen electrode an electrode made by depositing platinum black on platinum and then allowing it to absorb hydrogen gas to saturation; used in determination of hydrogen ion concentration.
indifferent electrode one larger than a therapeutic electrode, dispersing electrical stimulation over a larger area.
point electrode an electrode having on one end a metallic point; used in applying current.
therapeutic electrode one smaller than an indifferent electrode, producing electrical stimulation in a concentrated area; called also active electrode.

cal·o·mel e·lec·trode

an electrode in which the wire is connected through a pool of mercury to a paste of mercurous chloride (Hg2Cl2, calomel) in a potassium chloride solution covered by additional potassium chloride solution; commonly used as a reference electrode.

calomel electrode

An electrode that develops a standard electric potential and is used to provide a reference voltage in the circuit for sensing electrodes. It is composed of an amalgam of mercury and mercury (I) chloride. It is used as a standard in determining the pH of fluids.
See also: electrode
References in periodicals archive ?
Similarly, the sample was set as a working electrode with an exposed area of 1 [cm.sup.2], a piece of platinum sheet as a counter electrode, and the saturated calomel electrode as a reference electrode.
According to this method, if the potential of steel rebar becomes more negative than -270 mV when saturated calomel electrode is used as reference electrode, the probability of corrosion is 90% [22].
4, the guanine groups in the target DNA serve as electrochemical signal moieties that provide a small current produced by the oxidation at ~1.02 V (vs saturated calomel electrode).
Electrochemical measurements were performed in a three-electrode system where the working electrode was already described brass electrode, a saturated calomel electrode (SCE) was the reference electrode, and the platinum electrode was the auxiliary electrode.
In this equipment, saturated calomel electrode and carbon rod were chosen as the reference and auxiliary electrodes, respectively, while the specimen was used as the working electrode.
The electrode potential reported in this work was against the saturated calomel electrode (SCE).
Electrochemical performance measurements were performed on an electrochemical workstation (Instruments, RST5202F) using a three-electrode mood with a platinum foil as counter electrode, a saturated calomel electrode (SCE) as the reference electrode, and the 3D fennel-like [Co.sub.3][O.sub.4] on nickel foam directly used as working electrode in 6 mol/L KOH aqueous solution.
All the experiments were performed in standard three-compartment electrochemical glass cells with Pt wire as the counterelectrode and saturated calomel electrode as the reference electrode at room temperature.
The [alpha]-[Fe.sub.2][O.sub.3] nanoparticle-modified GC electrode, platinum wire, and saturated calomel electrode were used as the working, counter, and reference electrodes, respectively.
There were three electrodes, a glassy carbon electrode as working electrode, a saturated calomel electrode as reference electrode and a platinum wire electrode as an auxiliary or counter electrode.
The cell set up was made up of a working electrode (the deposited sample), a counter electrode (round-shaped platinum wafer with diameter of 1.8 cm and thickness of 0.1 cm), and a reference electrode (SCE, saturated calomel electrode).