Comparative Study of the Flavonoid Content in Radix Scutellaria from Different Cultivation Areas in China

Table 2

Validation parameters of the developed RP-HPLC/DAD method.

Compounds	Regressive equation	R^2	Linear range (μg·mL^−1)	LOD (μg·mL^−1)	LOQ (μg·mL^−1)	Recovery (%) (RSD %)
Scutellarin	y = 12.131x + 173.310	0.9994	19.00–209.00	0.558	1.859	99.1 (1.34)
Baicalin	y = 22.262x + 3.827	0.9998	23.00–253.00	0.795	2.650	99.5 (0.62)
Scutellarein	y = 40.394x − 13.768	0.9999	21.00–231.00	0.614	2.048	99.1 (1.50)
Wogonoside	y = 21.478x − 8.961	0.9996	21.00–231.00	0.656	2.187	100.0 (1.34)
Baicalein	y = 24.628x − 18.258	0.9998	20.00–220.00	0.581	1.937	100.4 (1.19)
Wogonin	y = 39.549x − 10.583	0.9997	22.00–242.00	0.646	2.154	99.2 (1.76)
Chrysin	y = 49.741x − 11.652	0.9999	18.00–198.00	0.529	1.765	99.2 (1.44)
Oroxylin A	y = 62.627x − 15.032	0.9995	19.00–209.00	0.508	1.692	99.7 (1.26)