✦ LIBER ✦

A glass-membrane pH microelectrode

✍ Scribed by Leo R. Pucacco; Norman W. Carter

Publisher: Elsevier Science
Year: 1976
Tongue: English
Weight: 706 KB
Volume: 73
Category: Article
ISSN: 0003-2697
DOI: 10.1016/0003-2697(76)90200-1

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✦ Synopsis

By miniaturizing the original MacInnes and Dole glass-membrane pH electrode a new pH microelectrode has been developed. The technique developed utilizes the tip of a high electrical resistance glass pipet that can be sealed with a thin membrane of H+-sensitive glass. Single-barreled electrodes have been made with tip diameters ranging from I.5 to 100 pm and double-barreled electrodes with tip diameters from 2 to 28 pm. The glass-membrane pH microelectrode provided a means for sensing the pH of biological solutions with an electrode having theoretical slope and tip configurational control. The most unique characteristics of the electrode were: the pH sensing surface was quite small. the tip diameter could be controlled, and the problem of electrode insulation was eliminated.

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