The non-enzymatic determination of glucose using an electrolytically fabricated nickel microparticle modified boron-doped diamond electrode or nickel foil electrode
A nickel modified boron-doped diamond (Ni-BDD) electrode or nickel foil electrode were used in the non-enzymatic determination of glucose in alkaline solutions. The Ni-BDD electrode was electrodeposited from a 1 mM Ni(NO3)2 solution (pH 5), followed by repeat cycling in KOH. Subsequent analysis util...
| Main Authors: | , , , |
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| Formato: | Journal article |
| Idioma: | English |
| Publicado: |
2010
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| Summary: | A nickel modified boron-doped diamond (Ni-BDD) electrode or nickel foil electrode were used in the non-enzymatic determination of glucose in alkaline solutions. The Ni-BDD electrode was electrodeposited from a 1 mM Ni(NO3)2 solution (pH 5), followed by repeat cycling in KOH. Subsequent analysis utilised the Ni(OH)2/NiOOH redox couple to electrocatalyse the oxidation of glucose. Glucose was determined to limits of 2.7 μM with a sensitivity of 1.04 μA μM-1 cm-2 at the Ni-BDD electrode. The foil electrode was comparably sensitive achieving a limit of 1.8 μM but a relatively lower sensitivity of 0.67 μA μM-1 cm-2. SEM analysis of the electrodes found the Ni-BDD to be modified by a quasi-random microparticle assembly, with approximately 7.6 μg cm-2 of nickel present on the surface. © 2010 Elsevier B.V. All rights reserved. |
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