Abstract
Graphite nanosheets prepared by thermal expansion and successive sonication were utilized for the construction of a multi-walled carbon nanotubes/graphite nanosheets based amperometric sensing platform to simultaneously determine acetaminophen and dopamine in the presence of ascorbic acid in physiological conditions. The synergistic effect of multiwalled carbon nanotubes and graphite nanosheets catalyzed the electrooxidation of acetaminophen and dopamine, leading to a remarkable potential difference up to 200 mV. The as-prepared modified electrode exhibited linear responses to acetaminophen and dopamine in the concentration ranges of 2.0 × 10−6–2.4 × 10−4 M (R = 0.999) and 2.0 × 10−6–2.0 × 10−4 M (R = 0.998), respectively. The detection limits were down to 2.3 × 10−7 M for acetaminophen and 3.5 × 10−7 M for dopamine (S/N = 3). Based on the simple preparation and prominent electrochemical properties, the obtained multiwalled carbon nanotubes/graphite nanosheets modified electrode would be a good candidate for the determination of acetaminophen and dopamine without the interference of ascorbic acid.
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Acknowledgments
We are grateful to anonymous reviewers for their helpful and insightful comments. This work was supported by the Open Project of the State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Sichuan Province, China (11zxfk26); and the Technology R&D Program of Sichuan Province (No. 2010GZ0300). Also we are grateful for the help of the Analytical and Testing Center of Southwest University of Science and Technology, Sichuan Province, China.
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Zhang, S., He, P., Zhang, G. et al. Multi-walled Carbon Nanotubes/Graphite Nanosheets Modified Glassy Carbon Electrode for the Simultaneous Determination of Acetaminophen and Dopamine. ANAL. SCI. 31, 657–662 (2015). https://doi.org/10.2116/analsci.31.657
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DOI: https://doi.org/10.2116/analsci.31.657