A tantalum electrode coated with graphene nanowalls for simultaneous voltammetric determination of dopamine, uric acid, L-tyrosine, and hydrochlorothiazide

2017 ◽  
Vol 184 (6) ◽  
pp. 1611-1619 ◽  
Author(s):  
Fangyuan Tian ◽  
Hongji Li ◽  
Mingji Li ◽  
Cuiping Li ◽  
Yingjie Lei ◽  
...  
Keyword(s):  
Uric Acid ◽  
Voltammetric Determination ◽  
Simultaneous Voltammetric Determination

scholarly journals Nanodiamond based surface modified screen-printed electrodes for the simultaneous voltammetric determination of dopamine and uric acid

2019 ◽  
Vol 186 (3) ◽  
Author(s):  
Marina Baccarin ◽  
Samuel J. Rowley-Neale ◽  
Éder T. G. Cavalheiro ◽  
Graham C. Smith ◽  
Craig E. Banks
Keyword(s):  
Uric Acid ◽  
Voltammetric Determination ◽  
Screen Printed Electrodes ◽  
Surface Modified ◽  
Simultaneous Voltammetric Determination ◽  
Screen Printed

scholarly journals ZIF-67/g-C3N4-Modified Electrode for Simultaneous Voltammetric Determination of Uric Acid and Acetaminophen with Cetyltrimethylammonium Bromide as Discriminating Agent

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Huynh Truong Ngo ◽  
Le Thi Hoa ◽  
Nguyen Tan Khanh ◽  
Tran Thi Bich Hoa ◽  
Tran Thanh Tam Toan ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Uric Acid ◽  
Modified Electrode ◽  
Photoelectron Spectroscopy ◽  
Cetyltrimethylammonium Bromide ◽  
Voltammetric Determination ◽  
Electrochemical Kinetics ◽  
X Ray ◽  
Simultaneous Voltammetric Determination

In the present paper, the ZIF-67/g-C3N4 composite was synthesized and utilized as a modifier for a glassy carbon electrode for the simultaneous voltammetric determination of uric acid (URA) and acetaminophen (ACE) with cetyltrimethylammonium bromide (CTAB) as a discriminating agent. The composite was characterized using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and nitrogen adsorption/desorption isotherms. The obtained ZIF-67/g-C3N4 composite exhibits good textural properties (specific surface area: 75 m2·g−1) and is stable in water with a pH range of 3 to 10. The ZIF-67/g-C3N4-modified electrode combined with CTAB as a discriminating agent possesses excellent catalytic electrochemistry towards URA and ACE with well-defined electrochemical responses. The electrochemical kinetics study is also addressed. The linear relation of the oxidation peak current of URA and ACE and the concentration ranging from 0.2 μM to 6.5 μM provide a detection limit of 0.052 μM for URA and 0.053 μM for ACE. The proposed method is well-suited to simultaneously analyze URA and ACE in human urine with comparable results with HPLC.

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