Table 1. Constants Obtained for the Linear Regression Analysis of the Solubility Data.

	solutes
constants	ibuprofen	aspirin	salicylic acid	fenulic acid	caffeine	mandelic acid
K1	0.08	0.05	0	0	0.01	0.67
K2	0.68	0.29	0.68	0.20	0.10	1.70
K3	7.86	4.68	0	0	1.10	11.7
K4	0	5.98	7.02	4.11	7.43	0
K5	0	0	0	0	0.34	0
K6	0	2.16	6.37	2.28	0	0
K7	0.001	0.017	0.009	0.004	0.10	1.04