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A sensitive electrochemical sensor composed of Nafion, tetraethylene pentamine-functionalized reduced graphene oxide (RGO-TEPA), and a glassy carbon electrode (GCE) was developed to analyze daphnetin (DAPH). The electrochemical behavior of DAPH… Click to show full abstract
A sensitive electrochemical sensor composed of Nafion, tetraethylene pentamine-functionalized reduced graphene oxide (RGO-TEPA), and a glassy carbon electrode (GCE) was developed to analyze daphnetin (DAPH). The electrochemical behavior of DAPH on Nafion/RGO-TEPA/GCE was studied by cyclic voltammetry. The electroanalytical method for DAPH detection was established using differential pulse voltammetry. A detection limit of 0.5 nM (S/N = 3) and a linear calibration range of 0.1 to 10 μM were obtained. The reproducibility and repeatability of the method were calculated to be 1.6% and 4.8%, respectively. The sensor showed good selectivity for DAPH and was successfully applied to detect DAPH in Zushima tablets. The content of DAPH in Zushima tablets detected by our sensor agreed well with that detected by HPLC.
Journal Title: International Journal of Electrochemical Science
Year Published: 2021
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