Table II.

Fitting of Drug Release Data for Cubic Phase Gels into Various Models

Sample	Ritger–Peppas’ empirical equation			Higuchi’s square-root equation		Zero-order model equation
	K R (% h −n)	n	r d	K H (% h −0.5)	r f	K0 (% h −1)	r h
F1	2.586	0.592	0.992	4.007	0.994	0.327	0.934
F2	2.349	0.602	0.992	3.831	0.994	0.314	0.938
F3	2.108	0.578	0.991	3.051	0.992	0.247	0.924

r ^d , r ^f , r ^h correlation coefficients for Ritger–Peppas’ empirical equation, Higuchi’s square-root equation, and zero-order model equation, respectively.