Abstract
In this work, we developed an efficient electrochemical exfoliation strategy for the preparation of graphene (eGr) nanosheets. Newly designed nanosheets-like eGr/GCE electrode possessed large specific surface area, low defect and good electrical conductivity, which facilitates the preconcentration of Kinetin (KT) onto the electrode surface. It exhibits a linear range extending from 0.5 to 100 µM and the lowest detection limit at 0.15 µM. The KT oxidation on eGr is an adsorption-controlled process, which involves a total of 4 H+ and 4 e− in the transferring processes. Moreover, there were no significant interfering substances among inorganics (NO3−, Cu2+, K+, PO43−, SO42−, Na+, Cl−), quercetin, rutin, luteolin, luteoloside, naphthylacetic acid, 2,4-dichlorophenoxyacetic acid and indole-3-acetic acid. The recoveries are in the range of 89.6–117.43% with a relative and deviation (RSD) < 4% (n = 3) for KT detection in lettuce.
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Acknowledgements
This work was financially supported by the National Natural Science Foundation of China (No. 51801039, 81860701, 82060714), Natural Science Foundation of Guizhou Province, China (NO. ZK [2021]242).
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Zhang, Y., Ai, J., Hu, H. et al. Highly sensitive detection of kinetin with electrochemical exfoliation of graphene nanosheets. Appl. Phys. A 128, 350 (2022). https://doi.org/10.1007/s00339-022-05471-7
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DOI: https://doi.org/10.1007/s00339-022-05471-7