Table 2.

Results of fitting the linear superimposition model (LSM) (i = 1) to experimental data of phenolic compounds release at pH 7.2. Evaluation of the quality of the regression on the basis of RMSE and R². The precision of estimates was evaluated using the SHW% (in parenthesis).

pH	RMSE	R2	X	kF (min−1)	kR (min−1)
7.2	0.099	0.900	0.204 (110.73%)	7.18 × 10−2 (594.49%)	7.63 × 10−3 (28.43%)

RMSE: root-mean-square error; R²: quality of the regression; X: fraction of compound released by Fickian transport; k_F: Fickian diffusion rate constant; k_R: relaxation rate constant.