Table 1.

Regression equations, LOD and LOQ of all analytes

Analytes	Regression equation	Dynamic range (μg/mL)	r	LOD (ng/mL)	LOQ (ng/mL)
Gallic acid	y = 2353.15x − 17496	20–320	0.9997	20.5	64.5
Ellagic acid	y = 1112.91x − 18658.51	39–624	0.9994	18.8	52.0
Punicalagin A	y = 413.95x − 12127.42	38.5–615.7	0.9978	12.4	50.2
Punicalagin B	y = 382.11x − 11194.54	35.5–568.3	0.9985	11.5	46.3
Punicalin A	y = 880.44x − 23405.09	19.8–316.2	0.9971	10.5	46.5
Punicalin B	y = 812.71x − 21604.70	18.2–291.8	0.9965	9.7	42.9