Table 1.

Summary of key parameters in statistic analysis.

Model	Salt	Regression equation of scatter plot	Correlation coefficient (R2)	RMSD	Coefficient of determination (r2)	p-Value (residual analysis)
ME-1	NaCl	y = 1.006x	0.9823	0.051	0.982	< 0.05
	NH4Cl	y = 0.9677x	0.9752	0.081	0.970	0.81
ME-2	NaCl	y = 1.115x	0.9711	0.12	0.907	< 0.05
	NH4Cl	y = 1.1125x	0.9748	0.128	0.924	< 0.05
EMT	NaCl	y = 1.0556x	0.9655	0.057	0.949	< 0.05
	NH4Cl	y = 1.0062x	0.9868	0.054	0.987	0.67

R² is the correlation coefficient of the scatter plot (p < 0.05); r² is the coefficient of determination between the model and experimental data.