Details

Autor(en) / Beteiligte

• Thanh, Tran Si
• Qui, Phan Tu
• Tu, Nguyen Thi Thanh
• Toan, Tran Thanh Tam
• Hoa, Tran Thi Bich
• Son, Le Van Thanh
• Nguyen, Do Mai
• Tuyen, Tran Ngoc
• Khieu, Dinh Quang
• Nguyen, Thanh-Danh
• Thanh-Danh Nguyen

Titel

Electrochemical Determination of Uric Acid in Urine by Using Zeolite Imidazolate Framework-11 Modified Electrode

Ist Teil von

• Journal of nanomaterials, 2021, Vol.2021, p.1-13

Ort / Verlag

New York: Hindawi

Erscheinungsjahr

2021

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• In the present article, the synthesis of zeolite imidazole framework-11 (ZIF-11) by ultrasonic-assisted hydrothermal process and its application as an electrode modifier for electrochemical determination of uric acid in urine are demonstrated. The obtained materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and nitrogen adsorption/desorption isotherms. It was found that the ZIF-11 with rhombic dodecahedron topology and high surface area (1066 m2.g-1) was synthesized in a certain temperature and found in around 25–40°C, and other crystalline phases of zinc benzimidazolate deferring from ZIF-11 phase were found in less 25°C or higher than 40°C. The ZIF-11 is stable in the pH range 6-10. The modification of glassy carbon electrode was performed with ZIF-67 using the drop-casting procedure. The present ZIF-11 modified electrode was employed to study the electrochemical behavior of uric acid (UA). UA oxidation is catalyzed by this electrode in aqueous buffer solution (pH 7) with a decrease of 70 mV in overpotential compared to glassy carbon electrode. With the differential pulse–anodic stripping voltammetry (DP-ASV) method, the oxidation current of UA versus its concentration shows good linearity in the range 20–540μM (R=0.998) with a detection limit of 0.48 μM (S/N=3). The obtained ZIF-11 modified electrode was applied in the detection of UA content in urine samples, and satisfied results were obtained.