Regression, LODs and LOQs for the investigated compounds.

Component	Regression equation	r	Linear range/(μg mL−1)	LOD (ng mL−1)	LOQ (ng mL−1)
Linarin	Y = 1999X + 5742	0.999 8	10.24–655.38	0.40	1.30
Rutin	Y = 14 952X − 2106	0.999 4	0.01875–2.360	0.37	1.02
Luteolin	Y = 14 102X + 15 678	0.999 7	0.02625–26.75	0.27	0.96
Quercetin	Y = 29 099X + 295.1	0.999 8	0.003875–2.47	0.38	1.00
Apigenin	Y = 30 536X + 12 621	0.999 5	0.02625–13.62	0.34	1.02
Acacetin	Y = 11 197X + 79 447	0.999 4	1.400–212.2	0.32	0.74
Acteoside	Y = 32 671X + 19 740	0.999 6	2.750–352.5	0.27	0.66