glass electrode


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glass e·lec·trode

a thin-walled glass bulb containing a standard buffer solution, quinhydrone, and a platinum wire; when immersed in an unknown solution, a potential difference develops that varies with the pH of the unknown solution; this difference can be made to give the pH; used in pH meters.

glass electrode

In chemistry, a chemical sensor that uses a glass membrane as the sensing surface, as opposed to one that uses an organic or solid-state membrane. The glass contains materials in its structure that are sensitive to a material that is to be measured. In the case of a pH glass electrode, lithium ions are commonly used
See also: electrode
References in periodicals archive ?
The meter accepts traditional glass electrodes and non-glass ISFET technology pH probes.
Compared with salt meters employing glass electrodes, the ES-421 is easier to use and maintain, and more robust.
Honeywell's latest Durafet III pH electrode is glass-free, so eliminates problems commonly associated with traditional glass electrodes such as fragility, poor response and frequent replacement.
Two glass electrodes placed within the posterior and anterior regions of the left ventricle measure the tissue pH and temperature of the heart, sending information via signal wires to a monitor that displays the pH levels.
The probe eliminates problems commonly associated with conventional glass electrodes such as: frequent probe replacement due to breakage; slow response due to probe aging; frequent calibration; and limited temperature and pH range.
These conducting nanoscale dielectric slivers are what Hunt calls liquid glass electrodes, fabricated at the U-M Center for Ultrafast Optical Science with a femtosecond laser, which emits light pulses that are only quadrillionths of a second long.
It is packed in a durable Ryton[R] body, resulting in extended life in a wide variety of process conditions, compared with traditional glass electrodes.
Due to ISFET technology, it is also claimed to be ten times faster than glass electrodes.
For extracellular recording we used pulled glass electrodes with tip sizes of 3-5 [micro]m and resistances of 3-10 M[omega].
Model 215, a research-grade meter, has dual electrode inputs, allowing both conventional glass electrodes and solid-state non-glass FET electrodes.
The stainless steel pH probe features a virtually unbreakable sensor that eliminates the frustrations of delicate glass electrodes.