Electrochemical oxidation of L-cysteine mediated by a fullerene-C60-modified carbon electrode
Use of a glassy carbon electrode modified by adhered microcrystals of fullerene-C60 mediates the oxidation of cysteine in the presence of aqueous potassium-containing electrolytes. Under conditions of cyclic voltammetry, the potential for the oxidation of cysteine is lowered by approximately 100 mV...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English English |
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Elsevier
2003
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| Online Access: | http://psasir.upm.edu.my/id/eprint/40034/ http://psasir.upm.edu.my/id/eprint/40034/1/Electrochemical%20oxidation%20of%20L-cysteine%20mediated%20by%20a%20fullerene-C%2060-modified%20carbon%20electrode.pdf http://psasir.upm.edu.my/id/eprint/40034/7/1-s2.0-S0003267003007918-main.pdf |
| _version_ | 1848849311228493824 |
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| author | Tan, Wee Tee Bond, Alan M. Ngooi, S. W. Lim, E. B. Goh, Joo Kheng |
| author_facet | Tan, Wee Tee Bond, Alan M. Ngooi, S. W. Lim, E. B. Goh, Joo Kheng |
| author_sort | Tan, Wee Tee |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Use of a glassy carbon electrode modified by adhered microcrystals of fullerene-C60 mediates the oxidation of cysteine in the presence of aqueous potassium-containing electrolytes. Under conditions of cyclic voltammetry, the potential for the oxidation of cysteine is lowered by approximately 100 mV and current is enhanced significantly relative to the situation prevailing when a bare glassy carbon electrode is used. Additional mediation occurs when the potential range covered includes that of C60/C60n− redox couples. The sensitivity under condition of cyclic voltammetry is significantly dependent on pH, temperature and C60 dosage. Excellent analytical and/or recovery data are obtained with vitamin pill, cassamino acid (hydrolyzed casein) and for a range of beverages. |
| first_indexed | 2025-11-15T09:48:22Z |
| format | Article |
| id | upm-40034 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English English |
| last_indexed | 2025-11-15T09:48:22Z |
| publishDate | 2003 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-400342024-09-13T03:21:56Z http://psasir.upm.edu.my/id/eprint/40034/ Electrochemical oxidation of L-cysteine mediated by a fullerene-C60-modified carbon electrode Tan, Wee Tee Bond, Alan M. Ngooi, S. W. Lim, E. B. Goh, Joo Kheng Use of a glassy carbon electrode modified by adhered microcrystals of fullerene-C60 mediates the oxidation of cysteine in the presence of aqueous potassium-containing electrolytes. Under conditions of cyclic voltammetry, the potential for the oxidation of cysteine is lowered by approximately 100 mV and current is enhanced significantly relative to the situation prevailing when a bare glassy carbon electrode is used. Additional mediation occurs when the potential range covered includes that of C60/C60n− redox couples. The sensitivity under condition of cyclic voltammetry is significantly dependent on pH, temperature and C60 dosage. Excellent analytical and/or recovery data are obtained with vitamin pill, cassamino acid (hydrolyzed casein) and for a range of beverages. Elsevier 2003-09 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/40034/1/Electrochemical%20oxidation%20of%20L-cysteine%20mediated%20by%20a%20fullerene-C%2060-modified%20carbon%20electrode.pdf text en http://psasir.upm.edu.my/id/eprint/40034/7/1-s2.0-S0003267003007918-main.pdf Tan, Wee Tee and Bond, Alan M. and Ngooi, S. W. and Lim, E. B. and Goh, Joo Kheng (2003) Electrochemical oxidation of L-cysteine mediated by a fullerene-C60-modified carbon electrode. Analytica Chimica Acta, 491 (2). pp. 181-191. ISSN 0003-2670; ESSN: 1873-4324 http://www.sciencedirect.com/science/article/pii/S0003267003007918 10.1016/S0003-2670(03)00791-8 |
| spellingShingle | Tan, Wee Tee Bond, Alan M. Ngooi, S. W. Lim, E. B. Goh, Joo Kheng Electrochemical oxidation of L-cysteine mediated by a fullerene-C60-modified carbon electrode |
| title | Electrochemical oxidation of L-cysteine mediated by a fullerene-C60-modified carbon electrode |
| title_full | Electrochemical oxidation of L-cysteine mediated by a fullerene-C60-modified carbon electrode |
| title_fullStr | Electrochemical oxidation of L-cysteine mediated by a fullerene-C60-modified carbon electrode |
| title_full_unstemmed | Electrochemical oxidation of L-cysteine mediated by a fullerene-C60-modified carbon electrode |
| title_short | Electrochemical oxidation of L-cysteine mediated by a fullerene-C60-modified carbon electrode |
| title_sort | electrochemical oxidation of l-cysteine mediated by a fullerene-c60-modified carbon electrode |
| url | http://psasir.upm.edu.my/id/eprint/40034/ http://psasir.upm.edu.my/id/eprint/40034/ http://psasir.upm.edu.my/id/eprint/40034/ http://psasir.upm.edu.my/id/eprint/40034/1/Electrochemical%20oxidation%20of%20L-cysteine%20mediated%20by%20a%20fullerene-C%2060-modified%20carbon%20electrode.pdf http://psasir.upm.edu.my/id/eprint/40034/7/1-s2.0-S0003267003007918-main.pdf |