Ultra-sensitive simultaneous electrochemical detection of sulfamethoxazole and trimethoprim based on the flower-like-nanostructures-modified screen-printed electrode.

Autor: Poursaeed, Ali Amir, Jahani, Shohreh, Moradalizadeh, Mehran, Shahidi Zandi, Mehdi, Foroughi, Mohammad Mehdi
Zdroj: Chemical Monthly / Monatshefte für Chemie; Nov2023, Vol. 154 Issue 11, p1213-1224, 12p
Abstrakt: A screen-printed electrode (SPE) modified with the flower-like nanostructures of zinc oxide doped with terbium for forming FL-NS Tb3+/ZnO/SPE-modified electrode (electrochemical sensor) was provided for effective and rapid detection of sulfamethoxazole (SMX) and trimethoprim (TMP). Therefore, structure, composition, as well as the impact of process variables of the modified electrode, electrochemical response features of SMX and TMP, sensitivity of both simultaneous detections, and scan rate were examined in this research. According to the examinations, synergy of Tb and ZnO resulted in the promotion of the electrochemical reaction of SMX and TMP. Moreover, the difference in their oxidation peak potential was < 220 mV. In addition, the modified electrode linearly ranged from 0.001 to 900.0 μM, with the detection limit of 0.14 nM and 0.23 nM (S/N = 5) for SMX and TMP, respectively. Finally, it was found that this new FL-NS Tb3+/ZnO/SPE-modified electrode enjoys a broader smaller detection limits, linear range, and very good stability and reproducibility. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
Externí odkaz: