▎ 摘　　要

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 mu M and the lowest detection limit at 0.15 mu M. 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.