Electrochemical determination of adenine using a glassy carbon electrode modified with graphene oxide and polyaniline
| Authors | |
|---|---|
| Year of publication | 2016 |
| Type | Article in Periodical |
| Magazine / Source | Microchimica Acta |
| MU Faculty or unit | |
| Citation | |
| Web | http://dx.doi.org/10.1007/s00604-015-1740-0 |
| Doi | http://dx.doi.org/10.1007/s00604-015-1740-0 |
| Field | Physical chemistry and theoretical chemistry |
| Keywords | nanocomposite; sensor; cyclic voltammetry; differential pulse voltammetry; scanning electron microscopy; Raman spectroscopy |
| Description | The electrochemical behavior of adenine at a glassy carbon electrode (GCE) modified with a nanocomposite consisting of graphene oxide and polyaniline was investigated by cyclic voltammetry and differential pulse voltammetry. The nanocomposite was synthesized by polymerization and characterized by Raman and UV-vis spectroscopy, and its morphology was examined by scanning electron microscopy. Adenine is oxidized at the modified GCE at a working potential of 1.2 V (vs. Ag/AgCl) and gives a current density of approximately 2.64 nA.cm(-2), which is distinctly increased compared to the 0.57 nA.cm(-2) of a bare electrode. Peak current and adenine concentration are linearly related to each other in the range from 0.5 mu M to 20 mu M. The modified GCE exhibits acceptable analytical performance, with a detection limit of 72 nM and a limit of quantification of 240 nM. It is excellently reproducible, stable, and fabrication is simple. |
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