Title: pH-sensitive electrode
Long Title: IUPAC Gold Book - pH-sensitive electrode
DOI: 10.1351/goldbook.09121
Status: current

Definition
Potentiometric electrochemical sensor that measures pH as a linear function of electrode potential.

Note
Measurement principles or methods include the use of an ion-selective electrode (see glass pH-sensitive electrode), ion-selective field effect transistor, metal-metal oxide electrodes, or redox electrode (e.g. hydrogen electrode, quinhydrone electrode).

Related Terms
- electrochemical sensor: https://goldbook.iupac.org//terms/view/09072
- glass pH-sensitive electrode: https://goldbook.iupac.org//terms/view/09115
- ion-selective field effect transistor: https://goldbook.iupac.org//terms/view/09118
- redox electrode: https://goldbook.iupac.org//terms/view/09095

Source
- PAC, 2020, 92, 641. 'Terminology of Electrochemical Methods of Analysis (IUPAC Recommendations 2019)' on page 666 (https://doi.org/10.1515/pac-2018-0109)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/09121/html
- json: https://goldbook.iupac.org/terms/view/09121/json
- xml: https://goldbook.iupac.org/terms/view/09121/xml

Citation: Citation: 'pH-sensitive electrode' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.09121
License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms.
Collection: If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .
Disclaimer: The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.
Accessed: 2026-06-28T19:01:07+00:00