Fig. 6

Fluorescence intensity of ZIF-8 MOF in the absence and presence of cyclosporine in the range of 0.01–1.0 µg mL^− 1. Inset: Calibration curve obtained for cyclosporine in plasma samples. Condition: pH 9.0, ZIF-8 MOF concentration of 100 µL, and incubation time of 2-minutes, an excitation wavelength of 370 nm and an emission wavelength of 417 nm