Optimization of Extract Method for Cynomorium songaricum Rupr. by Response Surface Methodology

Table 3

The parameter optimization of method validation.

Compounds	Concentrations (mg/L)	Linear equations	R^2	RSD of interday and intraday	RSD of stability
Gallic acid	0.04–0.4	y = 1995100.0000x + 48792.0000	0.9992	0.36	1.1
Protocatechuic acid	0.03–0.3	y = 286428.3894x + 3169.2192	0.9992	0.57	2.0
Catechin	0.02–0.2	y = 2973976.1835x + 8138.8420	0.9994	0.31	1.9