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Plastic Membrane Sensor from a Disposed Combined Glass Electrode. A Project for Graduate and Fourth-Year Undergraduate Students of Analytical Chemistry

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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

J. Chem. Educ., 2007, 84 (5), p 793

DOI: 10.1021/ed084p793

Publication Date (Web): May 1, 2007

Section:

History, Education, and Documentation

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.

Keywords (Audience):

Graduate Education / Research

Keywords (Domain):

Analytical Chemistry

Keywords (Feature):

Cost-Effective Teacher

Keywords (Pedagogy):

Hands-On Learning / Manipulatives

Keywords (Subject):

Electrochemistry

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This article has been cited by 1 ACS Journal articles (1 most recent appear below).

Inexpensive and Disposable pH Electrodes
Michael J. Goldcamp, Alfred Conklin, Kimberly Nelson, Jessica Marchetti, Ryan Brashear, and Emily Epure
Journal of Chemical Education2010 87 (11), 1262-1264
- Inexpensive and Disposable pH Electrodes
  Michael J. Goldcamp, Alfred Conklin, Kimberly Nelson, Jessica Marchetti, Ryan Brashear, and Emily Epure
  Journal of Chemical Education2010 87 (11), 1262-1264
  Inexpensive electrodes for the measurement of pH have been constructed using the ionophore tribenzylamine for sensing H+ concentrations. Both traditional liquid-membrane electrodes and coated-wire electrodes have been constructed and studied, and both ...
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