Table 4.

R² values of different drug release kinetics models and release exponents of different formulations

Formulation code	Correlation coefficient (R2)
	Zero order	First order	Korsmeyer–Peppas	Hixson–Crowell	Higuchi	Release exponent (n)
NP1	0.8723	0.2745	0.9976	0.5140	2.358	1.09
NP2	0.6703	0.0727	0.9652	0.3327	0.0323	0.914
NP3	0.7555	0.0802	0.9721	0.4064	0.1825	0.901
NP4	0.7501	0.0830	0.9736	0.4082	0.3626	0.852