Table 1. Stern-Volmer quenching equation of emodin, HEI1, HEI2, and HEI3 to BSA.

Variable	T/K	Kq (L/mol/s)	Ksv (L/mol)	r
Emodin	298	3.16×1012	3.16×104	0.9933
	310	2.60×1012	2.60×104	0.9967
HEI1	298	1.02×1013	1.02×105	0.9950
	310	9.26×1012	9.26×104	0.9985
HEI2	298	3.69×1013	3.69×105	0.9981
	310	2.26×1013	2.26×105	0.9975
HEI3	298	3.81×1013	3.81×105	0.9976
	310	2.93×1013	2.93×105	0.9990

r is the correlation coefficient. HEI1, 2-iodioemodin; HEI2, 2,4-diiodoemodin; HEI3, 2,4,5-triiodoemodin; BSA, bovine serum albumin.