Carbon Black-Carbon Nanotube Co-Doped Polyimide Sensors for Simultaneous Determination of Ascorbic Acid, Uric Acid, and Dopamine
Yue Wang,
Tian Yang,
Yasushi Hasebe,
Zhiqiang Zhang,
Dongping Tao
Affiliations
Yue Wang
School of Chemical Engineering, University of Science and Technology Liaoning, 185 Qianshan Middle Road, High-Tech Zone, Anshan 114051, Liaoning, China
Tian Yang
School of Chemical Engineering, University of Science and Technology Liaoning, 185 Qianshan Middle Road, High-Tech Zone, Anshan 114051, Liaoning, China
Yasushi Hasebe
Department of Life Science and Green Chemistry, Faculty of Engineering, Saitama Institute of Technology, 1690 Fusaiji, Fukaya, Saitama 369-0293, Japan
Zhiqiang Zhang
School of Chemical Engineering, University of Science and Technology Liaoning, 185 Qianshan Middle Road, High-Tech Zone, Anshan 114051, Liaoning, China
Dongping Tao
School of Mineral Engineering, University of Science and Technology Liaoning, 185 Qianshan Middle Road, High-Tech Zone, Anshan 114051, Liaoning, China
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.
