Abstract
A novel electrochemical sensing platform was developed that is based on the modification of a glassy carbon electrode with acetylene black and ionic liquids. The resulting electrode exhibited excellent electrocatalytic activity towards trifluralin in showing markedly increased redox peak currents. The experimental parameters affecting the response to trifluralin were optimized. Under optimal conditions, a linear response was obtained in the range from 80 nM to 12 µM of trifluralin (R = 0.9994). The detection limit is 10 nM (at S/N = 3) after open-circuit accumulation for 120 s. The method was successfully applied to determine trifluralin in soil samples. Features such as a large electroactive area, fast electron transfer and low background current make this composite electrode a promising platform for fabricating reliable electrochemical sensors for various species.
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Abbreviations
- AB:
-
Acetylene black
- ILs:
-
ionic liquids
- MWCNTs:
-
multi-wall carbon nanotubes
- CNTs:
-
Carbon nanotubes
- GCE:
-
Glass carbon electrode
- RSD:
-
Relative standard deviation
- BMIMPF6 :
-
1-butyl-3-methylimidazolium hexafluorophosphate
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Acknowledgement
This research was financially supported by the project from the National Natural Science Foundation of China (No. 20975088), the Key Project of Chinese Ministry of Education, the project from the Hunan Provincial Natural Science Foundation of China (No. 09JJ6018), the project from Scientific Research Fund of Hunan Provincial Education Department (No. 09A092), and the Open Project Program of Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education (No. 09HJYH05).
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Xu, N., Ding, Y., Ai, H. et al. Acetylene black-ionic liquids composite electrode: a novel platform for electrochemical sensing. Microchim Acta 170, 165–170 (2010). https://doi.org/10.1007/s00604-010-0384-3
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DOI: https://doi.org/10.1007/s00604-010-0384-3