Figure 2.

A. Stern–Volmer plot for the quenching of BSA by triptolide at different temperatures

^a. B. Double-log plots of triptolide quenching effect on BSA fluorescence at different temperatures

^a. Double-log plots of triptolide quenching effect on BSA fluorescence in at 298 K in the presence of site markers. C. The Van’t Hoff plot for the interaction of BSA and triptolide at different temperatures. D. Double-log plots of triptolide quenching effect on BSA fluorescence in at 298 K in the presence of site markers^a,b.

^a C_BSA=5.0×10⁻⁶ mol•L⁻¹, C_triptolide =1.0, 1.5, 2.0, 3.0, 5.0, 8.0, 10⁻⁶ mol•L⁻¹

^b C_BSA=^Cphenylbutazone= ^Cibuprofen=5.0×10⁻⁶ mol•L⁻¹

*F and F₀ are the fluorescence intensities in the presence and absence of quencher