Simultaneous Determination of Three Coumarins in Angelica dahurica by ¹H-qNMR Method: A Fast and Validated Method for Crude Drug Quality Control

Table 2

Standard curves of three components in A. dahurica.

Compound	Regression equation	r	Linearity (mg)
Imperatorin	Y = 0.1081X − 0.014	0.9995	0.2∼2
Byakangelicin	Y = 0.08X − 0.0065	0.9992	0.2∼2
Oxypeucedanin	Y = 0.1216X − 0.0147	0.9991	0.2∼2