Table 1.

Quenching constants (K_SV and K_q), stability constants (K_a), correlation coefficients (R) and binding site numbers (n) and thermodynamic parameters calculated according to Stern–Volmer plots and double logarithm plots of HSA + paeoniflorin system at three temperatures

HSA + paeoniflorin (K)	KSV (L mol−1)	Kq (L mol−1 s−1)	R2	KA (L mol−1)	n	∆G0 (kJ mol−1)	∆H0 (kJ mol−1)	∆S0 (J mol−1 K−1)
288	0.569 × 104	0.9483 × 1012	0.9965	1.909 × 103	0.9053	− 18.10
298	0.545 × 104	0.9083 × 1012	0.9941	1.680 × 103	0.8977	− 18.38	− 9.98	28.18
310	0.521 × 104	0.8683 × 1012	0.9873	1.421 × 103	0.8868	− 18.72

From 0.00 × 10⁻⁵ to 1.25 × 10⁻⁵ mol L⁻¹ at 2.50 × 10⁻⁶ mol L⁻¹ intervals ([HSA] = 1.0 × 10⁻⁵ mol L⁻¹, T = 288, 298 and 310 K)