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Electrochemical Determination of Diclofenac by Using ZIF-67/g-C3N4 Modified Electrode
Electrochemical Determination of Diclofenac by Using ZIF-67/g-C3N4 Modified Electrode
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Date
2021
Authors
Dang Thi Ngoc Hoa
Nguyen Thi Thanh Tu
Le Van Thanh Son
Le Vu Truong Son
Tran Thanh Tam Toan
Pham Le Minh Thong
Dao Ngoc Nhiem
Pham Khac Lieu
Dinh Quang Khieu
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Abstract
A facial differential pulse voltammetric procedure using a glassy carbon electrode modified with zeolite imidazolate framework-67/graphitic carbon nitride (ZIF-67/g-C3N4) for the diclofenac (DCF) determination is demonstrated. ZIF-67/g-C3N4 with different mass ratios of the components was synthesized in a self-assembly process. The obtained materials were characterized by using X-ray diffraction, scanning electron microscopy (SEM), EDX-mapping, and nitrogen adsorption/desorption isotherms. The peak current varies linearly with the DCF concentration in the range of 0.2–2.2 μmol·L−1 and has a detection limit of 0.071 μmol·L−1. The modified electrode exhibits acceptable repeatability, reproducibility, and selectivity towards DCF. The proposed electrode allows determining DCF in human urine without pretreatment, and the results are comparable with those determined with HPLC.