▎ 摘　　要

A nanocomposite consists of AuNPs, GQD, and poly(L-lysine) was prepared for highly sensitive electrochemical determination of dopamine (DA) and serotonin (5-HT) neurotransmitters which are of vital importance in neurological disorders. The P(L-Lys) GQD was successfully obtained a one-step co-electrodeposition of GQD and L-Lys on the PGE. The electrochemical behaviors of DA and 5-HT were analyzed via DPV and CV. LOD values for DA and 5-HT were calculated as 0.03 mu M and 0.017 mu M, respectively. Also, the DA and 5-HT contents were determined at the PGE/AuNPs/P(L-Lys)-GQD in fetal bovine serum samples and pharmaceutical formulations, and high recovery values were obtained.