Carbon Paste Electrode
A carbon-paste electrode (CPE) is made from a mixture of conducting graphite powder and a pasting liquid. These electrodes are simple to make and offer an easily renewable surface for electron exchange. Carbon paste electrodes belong to a special group of heterogeneous carbon electrodes. These electrodes are widely used mainly for voltammetric measurements; however, carbon paste-based sensors are also applicable in coulometry (both amperometry and potentiometry).
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“In a thousand apparently humble ways men busy themselves to make some right take the place of some wrong,—if it is only to make a better paste blacking,—and they are themselves so much the better morally for it.”
—Henry David Thoreau (1817–1862)