Abstract
An electrochemical sensor based on glassy carbon electrode modified with reduced graphene oxide-sodium dodecyl sulfate-Nafion* composite film was constructed and used to determine theophylline. The synthesized graphene oxide and surface morphology of the reduced graphene oxide-sodium dodecyl sulfate-Nafion film were characterized using IR spectroscopy, X-ray diffraction studies, and electrochemical impedance spectroscopy. The electrochemical behavior of the theophylline on the modified electrode was investigated using cyclic voltammetry and adsorptive differential pulse voltammetry. Under optimized analytical conditions, the electrode showed a linear response at concentrations of theophylline of 0.01–0.10, 0.1–1.0, and 1.0–40 µmol L−1 with the detection limit of 5 nmol L−1.
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The authors are grateful to the Research Council of Damghan University for the partial support of this work.
Nafion is a sulfonated tetrafluoroethylene-based fluoropolymer.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 11, pp. 2107—2112, November, 2020.
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Hamidi, M., Zarei, K. Electrochemical determination of theophylline on a glassy carbon electrode modified with reduced graphene oxide-sodium dodecyl sulfate-Nafion composite film. Russ Chem Bull 69, 2107–2112 (2020). https://doi.org/10.1007/s11172-020-3007-0
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DOI: https://doi.org/10.1007/s11172-020-3007-0