Table 4.

The mathematical models data fit information

Sample	Zero-order		First-order		Higuchi
	$k_0$	$R^2$	$k_1$	$R^2$	$k_h$	$R^2$
Pure Ketoprofen	0.3642	0.934	0.0086	0.970	5.4397	0.955
Silica aerogel ($0.033\raisebox{1ex}{$g$}\!\left/ \!\raisebox{-1ex}{${\mathit{cm}}^3$}\right.$)	0.4381	0.444	0.0708	0.995	11.011	0.552
Silica aerogel ($0.08\raisebox{1ex}{$g$}\!\left/ \!\raisebox{-1ex}{${\mathit{cm}}^3$}\right.$)	0.4789	0.568	0.0501	0.990	10.3949	0.733
Silica aerogel ($0.24\raisebox{1ex}{$g$}\!\left/ \!\raisebox{-1ex}{${\mathit{cm}}^3$}\right.$)	0.5026	0.642	0.0341	0.992	9.3498	0.853