▎ 摘　　要

Graphene oxide (GO) was for the first time designed as a bionano-label for sensitive chemiluminescent (CL) immunosensing of human IgG by taking advantage of a magnetic separation-mixing process and a GO-triggered luminol-H2O2 CL reaction. The detection limit of the concentration of human IgG is 1.2 pg mL(-1), which is comparable with or better than other immunoassays.