Voltammetric detection of sumatriptan in the presence of naproxen using Fe3O4@ZIF-8 nanoparticles modified screen printed graphite electrode

A novel electrochemical sensing platform was designed and prepared for the simultaneous detection of sumatriptan and naproxen by exploiting the prowess of the Fe3O4@ZIF-8 nanoparticles (NPs); as-synthesized Fe3O4@ZIF-8 NPs were characterized by energy-dispersive X-ray spectroscopy, fourier transform infrared spectroscopy, X-ray diffraction, field emission scanning electron microscopy (FESEM), transmission electron microscopy and thermal gravimetric analysis. The immobilized Fe3O4@ZIF-8 NPs on a screen printed graphite electrode (SPGE) was evaluated electrochemically via cyclic voltammetry, linear sweep voltammetry, and differential pulse voltammetry as well as chronoamprometery means; Fe3O4@ZIF-8/SPGE exhibited good sensing performance for sumatriptan in a range of 0.035-475.0 mu M with detection limit of 0.012 mu M. Also, Fe3O4@ZIF-8/SPGE exhibited good sensing performance for naproxen in a range of 0.1-700.0 mu M with detection limit of 0.03 mu M. The modified electrode showed two separate oxidative peaks at 620 mV for sumatriptan and at 830 mV for naproxen with a peak potential separation of 210 mV which was large enough to detect the two drugs simultaneously besides being stable in the long-run with considerable reproducibility. Real sample analyses were carried out to identify the function of fabricated electrode in sensing applications wherein trace amounts of sumatriptan and naproxen could be identified in these samples.

Automated summary

A novel electrochemical sensing platform utilizing Fe3O4@ZIF-8 nanoparticles was designed for the simultaneous detection of sumatriptan and naproxen. The modified electrode exhibited good sensing performance with stable and reproducible capabilities for the simultaneous detection of the two drugs. Through various characterization techniques, the Fe3O4@ZIF-8 nanoparticles immobilized on the electrode were shown to have great potential for sensing applications.