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The Application of Nafion Metal Catalyst Free Carbon Nanotube Modified Gold Electrode: Voltammetric Zinc Detection in Serum |
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| Authors: | Wei Yue Adam Bange Bill L Riehl Jay M Johnson Ian Papautsky William R Heineman |
| Institution: | 1. Department of Chemistry, University of Cincinnati, Cincinnati, OH, 45221‐0172, USA;2. Department of Chemistry, Xavier University, Cincinnati, OH, 45207, USA;3. SCNTE LTD P.O. Box 38, Alpha, OH 45301, USA;4. BiomicroSystems Labs, School of Electronic and Computing Systems, University of Cincinnati, Cincinnati, OH, 45221‐0030, USA |
| Abstract: | Metal catalyst free carbon nanotube (MCFCNT) whiskers were first used as an electrode modification material on a gold electrode surface for zinc voltammetric measurements. A composite film of Nafion and MCFCNT whiskers was applied to a gold electrode surface to form a mechanically stable sensor. The sensor was then used for zinc detection in both acetate buffer solution and extracted bovine serum solution. A limit of detection of 53 nM was achieved for a 120 s deposition time. The zinc in bovine serum was extracted via a double extraction procedure using dithizone in chloroform as a zinc chelating ligand. The modified electrode was found to be both reliable and sensitive for zinc measurements in both matrices. |
| Keywords: | Metal catalyst free carbon nanotubes Nafion Bovine serum Dithizone Anodic stripping voltammetry Zinc |