Corning Glass Works

Nunna Ramanaiah

Terry O Lanier

A relatively constant concentration of the electrolytic salt bridge solution within a pH reference electrode is maintained by including crystals of the electrolyte salt in a concentrated but not saturated solution. In a preferred electrode, the electrolytic salt bridge is a concentrated KCl solution (e.g. about 4 M/l) within which KCl crystals are held in place by an inert foraminous material disposed intermediate an internal reference electrode and a passageway in the electrode housing through which is established electrochemical contact between the salt bridge and a fluid, the pH of which is to be measured.

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Framingham, MA, United States of America

Nunna Ramanaiah