Table 4.

Investigation results of the linear relationship of the HPLC methods for four flavonoids.

Components	Linear Equations	R2	Repeatability RSD (%)	Precision RSD (%)	Stability RSD (%) (n = 7)
Rutin	$y = 14.997x-127.4$	0.9997	2.46	2.69	2.41
Vicenin I	$y = 16.656x-39.748$	0.9999	2.01	2.94	2.71
Vicenin II	$y = 12.589x-27.568$	0.9998	2.04	0.97	1.32
Vicenin III	$y = 18.269x-35.367$	0.9999	2.45	2.03	2.52