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- E-ISSN 2288-8985
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Characteristics of <TEX>${\alpha}$</TEX>-Cyclodextrin Modified Carbon Paste Electrode
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1996, v.9 no.3, pp.235-243
Jeon,
Y., Kim,
B., Kim,
H., Cho,
Y., &
Chung,
C.
(1996). Characteristics of <TEX>${\alpha}$</TEX>-Cyclodextrin Modified Carbon Paste Electrode. Analytical Science and Technology, 9(3), 235-243.
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Abstract
A carbon paste electrode were chemically modified using <TEX>${\alpha}$</TEX>-cyclodextrin. Characteristics of chemically modified carbon paste electrodes were studied on the basis of the inclusion complex formation of <TEX>${\alpha}$</TEX>-cyclodextrin and p-nitrophenol in solution. Cyclic voltammetry and differential pulse voltammetry were used to monitor the efficiency of the chemical modification. When the <TEX>${\alpha}$</TEX>-cyclodextrin and carbon powder ratio of 2 : 1 in weight were used, the reduction peak current of p-nitrophenol was decreased almost completely, whereas those of o-nitrophenol and hydroquinone were not changed much. This result is due to the large difference in the inclusion complex formation constants of p-nitrophenol and the other probes with <TEX>${\alpha}$</TEX>-cyclodextrin. Taking advantage of this difference, we can determine the concentration of o-nitrophenol even in the presence of p-nitrophenol.
- keywords
- <TEX>${\alpha}$</TEX>-cyclodextrin, carbon paste electrode, chemically modified electrode, p-ni trophenol, o-ni trophenol, hydroquinone
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