glass electrode


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Related to glass electrode: Ion selective electrode

glass electrode

[¦glas i′lek‚trōd]
(physical chemistry)
An electrode or half cell in which potential measurements are made through a glass membrane, which acts as a cation-exchange membrane; thus, the potential arises from phase-boundary and diffusion potentials which, depending on the composition of the glass, are logarithmic functions of the activity of the cations such as H+, Na+, or K+of the solutions in which the electrode is immersed.
References in periodicals archive ?
Foxboro Model 871PH pH and ORP sensors are now available with new electrodes, including the same domed glass electrodes used in award-winning DolpHin(TM) pH sensors, as well as with Nafion ion barriers, Variopin quick cable connectors, and protective Polytetrafluoroethylene (PTFE) (Teflon(R)) collars.
The spherical glass electrodes are for standard process applications up to 100 degrees C (212 F), and the flat ruggedized glass electrodes are for applications where the process water contains solid materials with pH up to 12 and temperatures up to 85 degrees C (185 F).
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.
The glass electrodes are ideal for use in lab-on-a-chip devices that integrate multiple laboratory functions onto one chip just millimeters or centimeters in size.
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.
This now means that engineers can replace glass electrodes with the new Durafet units and achieve a ten times faster response time, as well as longer life and reduced maintenance costs: