Simultaneous determination of ascorbic acid, dopamine and uric acid at a nitrogen-doped carbon nanofiber modified electrode

RSC Advances ◽  
2015 ◽  
Vol 5 (16) ◽  
pp. 11925-11932 ◽  
Author(s):  
Jinying Sun ◽  
Libo Li ◽  
Xueping Zhang ◽  
Dong Liu ◽  
Simin Lv ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Uric Acid ◽  
Carbon Nanofiber ◽  
Simultaneous Detection ◽  
High Sensitivity ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon ◽  
Small Biomolecules ◽  
Excellent Stability

This paper demonstrates high electrocatalytic activity of NCNF/GCE towards small biomolecules. The proposed electrochemical sensor exhibits good selectivity, high sensitivity and excellent stability towards AA, DA and UA simultaneous detection.

scholarly journals Carbon Black-Carbon Nanotube Co-Doped Polyimide Sensors for Simultaneous Determination of Ascorbic Acid, Uric Acid, and Dopamine

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1691 ◽  
Author(s):  
Yue Wang ◽  
Tian Yang ◽  
Yasushi Hasebe ◽  
Zhiqiang Zhang ◽  
Dongping Tao
Keyword(s):  
Ascorbic Acid ◽  
Uric Acid ◽  
Carbon Nanotube ◽  
Carbon Black ◽  
Simultaneous Determination ◽  
Simultaneous Detection ◽  
High Sensitivity ◽  
Differential Pulse ◽  
Co Doped

Carbon black (CB) and carbon nanotube (CNT) co-doped polyimide (PI) modified glassy carbon electrode (CB-CNT/PI/GCE) was first prepared for the simultaneous determination of ascorbic acid (AA), dopamine (DA), and uric acid (UA). The CB-CNT/PI/GCE exhibited persistent electrochemical behavior and excellent catalytic activities. Cyclic voltammetry (CV) and differential pulse voltammetry (DPV) were used for the simultaneous detection of AA, DA, and UA in their ternary mixture. The peak separations between AA and DA, and DA and UA, are up to 166 mV and 148 mV, respectively. The CB-CNT/PI/GCE exhibited high sensitivity to DA and UA, with the detection limit of 1.9 µM and 3 µM, respectively. In addition, the CB-CNT/PI/GCE showed sufficient selectivity and long-term stability, and was applicable to detect AA, DA, and UA in human urine sample.

Nitrogen-doped carbon nanodots prepared from polyethylenimine for fluorometric determination of salivary uric acid

2019 ◽  
Vol 186 (3) ◽  
Author(s):  
Wei-Cheng Wu ◽  
Hsin-Yi Tiffany Chen ◽  
Shih-Chi Lin ◽  
Hsin-Ying Chen ◽  
Fu-Rong Chen ◽  
...  
Keyword(s):  
Uric Acid ◽  
Carbon Nanodots ◽  
Fluorometric Determination ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon

A nitrogen doped carbon quantum dot-enhanced chemiluminescence method for the determination of Mn2+

2018 ◽  
Vol 10 (5) ◽  
pp. 541-547 ◽  
Author(s):  
Junmei Zhang ◽  
Xiaoxia Chen ◽  
Yue Li ◽  
Suqin Han ◽  
Yao Du ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Ascorbic Acid ◽  
Ultrasonic Method ◽  
Carbon Quantum Dots ◽  
Chemiluminescence Method ◽  
Nitrogen Doped ◽  
Carbon Quantum Dot ◽  
Enhanced Chemiluminescence ◽  
Nitrogen Doped Carbon

Nitrogen doped carbon quantum dots (NCQDs) were synthesized via an ultrasonic method with ascorbic acid as the carbon source and ammonia as the nitrogen source.

scholarly journals Three-Dimensional Au/Holey-Graphene as Efficient Electrochemical Interface for Simultaneous Determination of Ascorbic Acid, Dopamine and Uric Acid

Micromachines ◽  
2019 ◽  
Vol 10 (2) ◽  
pp. 84 ◽  
Author(s):  
Aihua Jing ◽  
Gaofeng Liang ◽  
Yixin Yuan ◽  
Wenpo Feng
Keyword(s):  
Electron Microscopy ◽  
Ascorbic Acid ◽  
Uric Acid ◽  
Graphene Oxide ◽  
Composite Structures ◽  
Three Dimensional ◽  
High Sensitivity ◽  
Cyclic Voltammograms ◽  
Brain Physiology

The quantification of ascorbic acid (AA), dopamine (DA), and uric acid (UA) has been an important area of research, as these molecules’ determination directly corresponds to the diagnosis and control of diseases of nerve and brain physiology. In our research, graphene oxide (GO) with nano pores deposited with gold nanoparticles were self-assembled to form three-dimensional (3D) Au/holey-graphene oxide (Au/HGO) composite structures. The as-prepared 3DAu/HGO composite structures were characterized for their structures by X-ray diffraction, Raman spectrum, scanning electron microscopy, and transmission electron microscopy coupled with cyclic voltammograms. Finally, the proposed 3DAu/HGO displayed high sensitivity, excellent electron transport properties, and selectivity for the simultaneous electrochemical determination of AA, DA and UA with linear response ranges of 1.0–500 μM, 0.01–50 μM and 0.05–50 μM respectively. This finding paves the way for graphene applications as a biosensor for detecting three analytes in human serum.

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