Amperometric Sensor for Glutathione Based on a Mechanically Immobilized Cobalt Hexacyanoferrate Modified Electrode
A mechanically immobilized cobalt hexacyanoferrate modified electrode has been constructed. The modified electrode exhibits two reversible redox peaks in a 0.1 M NaCl medium, and can be used for the amperometric determination of glutathione. The modified electrode facilitates the catalytic oxidation...
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| Veröffentlicht in: | Bulletin of the Chemical Society of Japan 2002-03, Vol.75 (3), p.501-505 |
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| container_title | Bulletin of the Chemical Society of Japan |
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| creator | Ravi Shankaran, Dhesingh Sriman Narayanan, Sangilimuthu |
| description | A mechanically immobilized cobalt hexacyanoferrate modified electrode has been constructed. The modified electrode exhibits two reversible redox peaks in a 0.1 M NaCl medium, and can be used for the amperometric determination of glutathione. The modified electrode facilitates the catalytic oxidation of glutathione at a reduced overpotential compared with an unmodified graphite electrode. Glutathione was determined in the range of 4 × 10-5 to 5.2 × 10-4 M in 0.1 M NaCl and in 0.1 M KCl with correlation coefficients of 0.9991 and 0.9992, respectively. Relative standard deviations of 2.88% in NaCl and 3.27% in KCl were obtained for 4 × 10-4 M GSH (n = 10). The sensor exhibited excellent stability, reproducibility and immediate response, and can be used in flow-injection analysis. |
| doi_str_mv | 10.1246/bcsj.75.501 |
| format | Article |
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The modified electrode exhibits two reversible redox peaks in a 0.1 M NaCl medium, and can be used for the amperometric determination of glutathione. The modified electrode facilitates the catalytic oxidation of glutathione at a reduced overpotential compared with an unmodified graphite electrode. Glutathione was determined in the range of 4 × 10-5 to 5.2 × 10-4 M in 0.1 M NaCl and in 0.1 M KCl with correlation coefficients of 0.9991 and 0.9992, respectively. Relative standard deviations of 2.88% in NaCl and 3.27% in KCl were obtained for 4 × 10-4 M GSH (n = 10). 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The modified electrode exhibits two reversible redox peaks in a 0.1 M NaCl medium, and can be used for the amperometric determination of glutathione. The modified electrode facilitates the catalytic oxidation of glutathione at a reduced overpotential compared with an unmodified graphite electrode. Glutathione was determined in the range of 4 × 10-5 to 5.2 × 10-4 M in 0.1 M NaCl and in 0.1 M KCl with correlation coefficients of 0.9991 and 0.9992, respectively. Relative standard deviations of 2.88% in NaCl and 3.27% in KCl were obtained for 4 × 10-4 M GSH (n = 10). 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The modified electrode exhibits two reversible redox peaks in a 0.1 M NaCl medium, and can be used for the amperometric determination of glutathione. The modified electrode facilitates the catalytic oxidation of glutathione at a reduced overpotential compared with an unmodified graphite electrode. Glutathione was determined in the range of 4 × 10-5 to 5.2 × 10-4 M in 0.1 M NaCl and in 0.1 M KCl with correlation coefficients of 0.9991 and 0.9992, respectively. Relative standard deviations of 2.88% in NaCl and 3.27% in KCl were obtained for 4 × 10-4 M GSH (n = 10). The sensor exhibited excellent stability, reproducibility and immediate response, and can be used in flow-injection analysis.</abstract><cop>Tokyo</cop><pub>The Chemical Society of Japan</pub><doi>10.1246/bcsj.75.501</doi><tpages>5</tpages></addata></record> |
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| ispartof | Bulletin of the Chemical Society of Japan, 2002-03, Vol.75 (3), p.501-505 |
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| language | eng |
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| source | Oxford University Press Journals All Titles (1996-Current) |
| title | Amperometric Sensor for Glutathione Based on a Mechanically Immobilized Cobalt Hexacyanoferrate Modified Electrode |
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