Department
Chemistry
Degree Name
Master of Science (MS)
Abstract
Coated-graphite ion-selective electrodes which are sensitive and reasonably selective for Na+ ion and K+ ion are developed and characterized. The electrode specific for sodium ion is based on the use of the antibiotic monensin as electroactive material employing o-n-octyloxynitrobenzene as a plasticizer in a polyvinyl chloride matrix. The one that is specific for potassium ion is based on the use of the antibiotic nigericin as a novel electroactive material employing o-n-octyloxynitrobenzene as a plasticizer in a polyvinyl chloride matrix. Selectivity coefficients, Nernstian response, linear range, detection limit and stability of electrode upon storage are characteristics studied. Preparation of the coated-graphite sensor is simple and rapid. Moreover, it is quite inexpensive. The results indicate that both monensin-based and nigericin-based coated-graphite ion selective electrodes, though not superb, could be of considerable value as analytical tools for the determination of Na+ and K+ ion, respectively, in some systems. A limitation is their applicability in aqueous media only, as organic solvents will dissolve the membrane.
Keywords
Potassium, Sodium, Graphite, Electrodes, Ions, Experiments, Measurements
Advisor
Dr. Delbert A. Marshall
Date of Award
Fall 1984
Document Type
Thesis - campus only access
Recommended Citation
Nagara, Byaporn na, "Coated-Graphite Ion-Selective Electrode for Na+ Ion and K+ Ion" (1984). Master's Theses. 1920.
DOI: 10.58809/UBPL9036
Available at:
https://scholars.fhsu.edu/theses/1920
Rights
© The Author(s)
Comments
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