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Materials 2018, 11(9), 1691; https://doi.org/10.3390/ma11091691

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

1
School of Chemical Engineering, University of Science and Technology Liaoning, 185 Qianshan Middle Road, High-Tech Zone, Anshan 114051, Liaoning, China
2
Department of Life Science and Green Chemistry, Faculty of Engineering, Saitama Institute of Technology, 1690 Fusaiji, Fukaya, Saitama 369-0293, Japan
3
School of Mineral Engineering, University of Science and Technology Liaoning, 185 Qianshan Middle Road, High-Tech Zone, Anshan 114051, Liaoning, China
*
Authors to whom correspondence should be addressed.
Received: 7 August 2018 / Revised: 9 September 2018 / Accepted: 10 September 2018 / Published: 12 September 2018
(This article belongs to the Special Issue Optical Materials for Sensing and Bioimaging: Advances and Challenges)
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Abstract

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. View Full-Text
Keywords: polyimide; simultaneous determination; uric acid; dopamine; ascorbic acid polyimide; simultaneous determination; uric acid; dopamine; ascorbic acid
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Wang, Y.; Yang, T.; Hasebe, Y.; Zhang, Z.; Tao, D. Carbon Black-Carbon Nanotube Co-Doped Polyimide Sensors for Simultaneous Determination of Ascorbic Acid, Uric Acid, and Dopamine. Materials 2018, 11, 1691.

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