▎ 摘　　要

A mercury ion imprinted polymer material was prepared using a thiourea derivative functionalised graphene quantum dot (GQDTU) as the functional monomer using suspension polymerisation technique. This ion imprinted polymer (GQDTU-IIP) material was used to modify the surface of a glassy carbon electrode by drop casting method. The modified electrode was used for the detection of mercury using cyclic voltammetry (CV) and differential pulse voltammetric (DPV) techniques. The sensing performance was compared with a non-imprinted polymer (NIP) modified electrode. The GQDTU-IIP modified electrode showed a linear response towards concentration of Hg(II) ions in the range 5 x 10(-8) M to 2.3 x 10(-5) M using DPV with a limit of detection 23.5 nM. CV also showed linear response ranges of 6 x 10(-8) M to 8.5 x 10(-7) M and 1.4 x 10(-6) M to 7 x 10(-6) M with a limit of detection 30.2 nM. The electrode was used for the analysis of Hg(II) ions in real water samples.