Fig. 2.

Fluorescence spectra of HSA + paeoniflorin solutions with paeoniflorin concentrations (a–f) (from 0.0 × 10⁻⁵ to 1.25 × 10⁻⁵ mol L⁻¹ at 2.5 × 10⁻⁶ mol L⁻¹ intervals) ([HSA] = 1.0 × 10⁻⁵ mol L⁻¹, T = 288 K (a); 298 K (b); 310 K (c))