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  Home > JCE Print > Journal of Chemical Education > Issues > 2007  > May  >
In the Classroom
Cost-Effective Teacher
Plastic Membrane Sensor from a Disposed Combined Glass Electrode
A Project for Graduate and Fourth-Year Undergraduate Students of Analytical Chemistry
Hayat M. Marafie and Adel F. Shoukry
Department of Chemistry, Faculty of Science, Kuwait University, Safat, 13060 Kuwait

Laila A. Alshatti
The Public Authority for Applied Education and Training, College of Health Sciences, Kuwait

Cover
May 2007
Vol. 84 No. 5
p. 793
Abstract
A combined plastic membrane hydralazinium (Hz) selective electrode was constructed from a disposed combined glass electrode. The glass bulb was removed and a plastic membrane containing Hz–reineckate ion pair, as exchanger, was glued to a polyethylene cap fixed in place of the glass bulb. The electrode exhibited average calibration graph slope of (49.1 mV)/(Hz concentration grade) at 25 °C and high selectivity for Hz against several inorganic cations. The electrode was employed to determine the solubility product of the ion pair and as a sensor for potentiometric determination of HzCl by potentiometric titration.
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Detailed information about how to prepare the electrodes and how to construct the calibration graph are available.
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Citation
Marafie, Hayat M.; Shoukry, Adel F.; Alshatti, Laila A. J. Chem. Educ. 2007, 84, 793.
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Keywords
Analytical Chemistry; Electrochemistry; Graduate Education / Research; Hands-On Learning / Manipulatives; Instrumental Methods; Ion Selective Electrodes; Laboratory Equipment / Apparatus; Laboratory Instruction; Membranes; Potentiometry; Quantitative Analysis; Upper-Division Undergraduate
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History
Created:
Last Updated:
3/22/2007
4/9/2007
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