Fabrication of a reproducible, stable and sensitive platform for P4 oxidation was reported.
Electrochemical studies suggested excellent electrochemical catalytic activity toward the oxidation of P4.
The Fe3O4@GQD(*)/f–MWCNTs/GCE showed higher selectivity for determination of P4 than the bare GCE.
This sensor could be successfully applied for determination of P4 in human serum samples and pharmaceutical products.