(a) Fluorescence spectra of the FITC-labeled goat anti-human anti-IgG in the supernatant before and after reaction with f-CSCNTs-APBA-IgG and f-CSCNTs-IgG; (b) fluorescent test of the separated conjugates. To avoid interferences, the obtained conjugates were purified by repeated washing and then diluted to different concentrations for fluorescence measurements.
