Table 2.

Validation parameters of HPLC

Compound	R2	Recovery (%)	LOD (mg/kg)	LOQ (mg/kg)	5 mg/L		20 mg/L		40 mg/L
					RSRr	RSDR	RSRr	RSDR	RSRr	RSDR
Quercetin	0.9975	87.9	1.14	1.51	0.66	1.89	1.57	1.93	1.81	3.09
Galangin	0.9936	80.0	0.93	1.58	0.72	1.51	0.78	1.67	1.09	1.81
Apigenin	0.9987	104.9	1.13	1.90	0.75	1.01	1.05	1.26	1.16	1.93
Pinocembrin	0.9969	110.2	0.70	1.20	0.78	1.51	1.75	2.27	1.98	2.30
Caffeic acid	0.9983	108.4	0.89	1.45	0.30	1.52	1.22	2.23	1.31	2.93
p-Coumaric acid	0.9980	106.2	0.67	0.93	0.23	1.22	1.32	1.47	1.43	1.68
Trans-ferulic acid	0.9983	98.7	0.56	0.60	0.37	1.12	1.56	1.82	1.78	2.21
Protocatechuic acid	0.9983	108.7	0.51	0.82	0.80	1.18	0.97	1.24	1.07	1.92
Trans-cinnamic acid	0.9984	88.5	0.61	0.66	0.57	1.06	0.91	1.44	1.09	1.76
Caffeic acid Phenethyl ester (CAPE)	0.9983	98.9	0.51	1.18	0.24	1.37	1.45	1.83	1.59	2.37