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ERIC Number: EJ905839
Record Type: Journal
Publication Date: 2009-Feb
Pages: 4
Abstractor: As Provided
Reference Count: 13
ISSN: ISSN-0018-9359
A pH Sensor Based on a Stainless Steel Electrode Electrodeposited with Iridium Oxide
Martinez, C. C. M.; Madrid, R. E.; Felice, C. J.
IEEE Transactions on Education, v52 n1 p133-136 Feb 2009
A simple procedure to make an iridium oxide (IrO[subscript 2]) electrodeposited pH sensor, that can be used in a chemical, biomedical, or materials laboratory, is presented here. Some exercises, based on this sensor, that can be used to teach important concepts in the field of biomedical, biochemical, tissue, or materials engineering, are also presented. This novel procedure is based on the electrodeposition of IrO[subscript 2] on a stainless steel electrode, which uses a similar mechanism to an ion selective electrode (ISE) and senses changes in pH. The simplicity and cost effectiveness of this method facilitates the teaching of the concept of half-cell potential and the basics of sensors. This novel sensor has also been shown to outperform the classical glass pH-sensor. In this new methodology, students learn to build the electrode, to calibrate it, and to measure its sensitivity, repeatability, and time-response. (Contains 2 tables and 5 figures.)
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Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A