Table 4.

Fitting parameters of the pseudo-first- and pseudo-second-order kinetic models for the release of MB from the chitosan/pectin blend hydrogel in different fluids.

Model	k1 (min−1)	k2 (L mg−1min−1)	R²	χ²	AIC
Simulated gastric fluid (25 °C)
Pseudo-first-order	0.0301	-	0.793	5.64 × 10−6	−73.66
Pseudo-second-order	-	2.267	0.848	4.14 × 10−6	−75.68
	Simulated intestinal fluid (25 °C)
Pseudo-first-order	0.604	-	0.820	2.02 × 10−6	−51.74
Pseudo-second-order	-	57.769	0.889	1.24 × 10−6	−54.02
	Simulated gastric fluid (37 °C)
Pseudo-first-order	0.024	-	0.891	2.75 × 10−6	−67.24
Pseudo-second-order	-	1.818	0.907	2.34 × 10−6	−68.15
	Simulated intestinal fluid (37 °C)
Pseudo-first-order	0.067	-	0.881	1.41 × 10−6	−59.32
Pseudo-second-order	-	10.919	0.949	5.98 × 10−7	−63.42