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Anodic square-wave stripping voltammetric analysis of epinephrine using carbon fiber microelectrode |
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| Authors: | Suw-Young Ly In-Gul Moon Sam-Young Jung Tae-Kee Hong |
| Affiliation: | a Department of Fine Chemistry, School of Applied Chemical Engineering, Seoul National University of Technology, Seoul 139-743, South Korea b Department of Internal Medicine. Samsung Cheil General Hospital, Seoul, South Korea c Department of Chemistry, Hanseo University, Seosan, Chungnam, 356-820, Korea d Department of Science, Georgia Perimeter College- Dunwoody Campus, Dunwoody, GA, 30338-4497, USA |
| Abstract: | The behavior of epinephrine on a carbon fiber microelectrode (CFME) was studied with cyclic voltammetry and square-wave (SW) stripping voltammetry in order to find optimum conditions for its analysis using the CFME. An anodic stripping peak at about 0.20 V (vs. Ag/AgCl) was utilized. Under optimum conditions for anodic stripping (a pH value of 7.4, a deposition potential of − 0.5 V, a deposition time of 90 s, a final potential of 0.8 V, a SW frequency of 20 Hz, a step potential of 5 mV, and an amplitude of 45 mV), the calibration was linear in the concentration range of 0.0∼0.4 mg/L, and the detection limit was found to be 0.009 mg/L with a relative standard deviation 0.18% (n = 12) at 0.2 mg/L. The analytical performance of the CMFE, which is unmodified, is comparable to or better than other voltammetric results with various modified electrodes. |
| Keywords: | Epinephrine Carbon fiber microelectrode (CFME) Square-wave anodic stripping voltammetry (SWASV) |
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