Research Article
A Colorimetric Immunoassay Based on g-C3N4@Fe3O4 Nanocomposite for Detection of Carcinoembryonic Antigen
Figure 3
The effect of (a) pH of phosphate buffer solution, (b) incubation time of antibody and antigen, and (c) HCl concentration. (d) Calibration plot of CEA levels (the inset: UV-vis absorption spectrums in 400 nm–700 nm of colorimetric immunoassay toward different CEA concentrations).
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