Table 2.

The correlation coefficient, rate constant, and half-life obtained by fitting the sorafenib release data into the PBS solution at pH 4.8 and pH 7.4.

Sample	Saturation Release	R2			Pseudo-Second- Order Rate Constant (k(mg/min))	t1/2
		Pseudo- First-Order	Pseudo-Second- Order	Parabolic Diffusion
4.8	99.90	0.9331	0.9992	0.6387	4.32 × 10−3	134
7.4	97.96	0.8677	0.9986	0.7070	4.31 × 10−3	181