Figure 5: The synchronous fluorescence spectra of CIT-HSA. The concentration of HSA was 1.5 μM while the CIT concentration corresponding to 0, 1.67, 3.33, 5.0, 6.67, 8.33, 10.0, and 13.3 μM is from a to i, respectively. Tris buffer, pH = 7.4,  K,  nm.