. 2021 Mar 10;13(6):855. doi: 10.3390/polym13060855

Table 5.

The correlation coefficient, rate constant, and half-life obtained by fitting the 5-FU release data for the PBS solution at pH 4.8 and pH 7.4.

Sample pH	Saturation Release/%	R²			Pseudo Second Order Rate Constant (k(mg/min))	t_1/2
		Pseudo-First-Order	Pseudo-Second-Order	Parabolic- Diffusion
4.8	99.99	0.9283	0.9999	0.7498	4.33 × 10⁻³	97
7.4	99.57	0.8705	0.9987	0.5802	4.31 × 10⁻³	84