Abstract
An electrochemical sensor based on carbon nanotubes (CNTs)-ionic liquid (IL) composite has been developed for the simultaneous determination of serotonin (5-HT) and dopamine (DA). The CNTs-IL composite modified electrode presents excellent selectivity and sensitivity towards 5-HT and DA and eliminates the interference of ascorbic acid. The parameters which influence the determination of 5-HT and DA have been investigated. Under optimized conditions, linear calibration graphs were obtained in the range from 20 nM to 7 µM, with a detection of limit of 8 nM, for 5-HT, and in the range from 0.1 to 12 µM, with a detection of limit of 60 nM, for DA. The electrode has been applied to the assay of 5-HT and DA in human blood serum with good results.
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Acknowledgement
This work was supported by the Key Project of Chinese Ministry of Education (No. 206104), Hunan Provincial Natural Science Foundation of China, and the Open Project Program of Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education.
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Sun, Y., Fei, J., Hou, J. et al. Simultaneous determination of dopamine and serotonin using a carbon nanotubes-ionic liquid gel modified glassy carbon electrode. Microchim Acta 165, 373–379 (2009). https://doi.org/10.1007/s00604-009-0147-1
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DOI: https://doi.org/10.1007/s00604-009-0147-1