Inexpensive and Disposable pH Electrodes

Autor/inn/en	Goldcamp, Michael J.; Conklin, Alfred; Nelson, Kimberly; Marchetti, Jessica; Brashear, Ryan; Epure, Emily
Titel	Inexpensive and Disposable pH Electrodes
Quelle	In: Journal of Chemical Education, 87 (2010) 11, S.1262-1264 (3 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0021-9584
DOI	10.1021/ed1005008
Schlagwörter	Chemistry; Science Instruction; Measurement Equipment; Measurement Techniques; College Science; Energy; Science Experiments + Suchen Sie Ihr Suchwort? Chemie; Teaching of science; Science education; Natural sciences Lessons; Naturwissenschaftlicher Unterricht; Messinstrument; Messtechnik; Energie
Abstract	Inexpensive electrodes for the measurement of pH have been constructed using the ionophore tribenzylamine for sensing H[superscript +] concentrations. Both traditional liquid-membrane electrodes and coated-wire electrodes have been constructed and studied, and both exhibit linear, nearly Nernstian responses to changes in pH. Measurements of pH from these electrodes are accurate when compared to values obtained from simultaneous measurements using commercially available pH electrodes. The electrodes function well between pH values of 3 and 10. These electrodes are typically functional for two or more months before performance begins to degrade. Performing measurements in samples with abrasive solids, such as soils, also limits the working lifetimes of the electrodes. Students have successfully constructed these electrodes and used them in the measurement of soil pH levels. (Contains 3 figures.) (As Provided).
Anmerkungen	Division of Chemical Education, Inc and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail: eic@jce.acs.org; Web site: http://pubs.acs.org/jchemeduc
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10