Analysis of the Correlation between Commodity Grade and Quality of Angelica sinensis by Determination of Active Compounds Using Ultraperformance Liquid Chromatography Coupled with Chemometrics

Table 2

Calibration curves, LODs, LOQs, and precision for ferulic acid, senkyunolide A, n-butylphthalide, ligustilide, and butylidenephthalide.

Reference samples	Calibration curves	𝑅^2	Test ranges (mg/mL)	LODs (μg/mL)	LOQs (μg/mL)
Ferulic acid	𝑌=3𝐸+07𝑋+2835.3	0.9999	0.032~1.722	4.15	11.06
Senkyunolide A	𝑌=2𝐸+07𝑋+5256.2	1	0.030~0.415	4.57	11.78
n-Butylphthalide	𝑌=7𝐸+07𝑋+295390	0.999	0.156~0.722	5.33	12.56
Ligustilide	𝑌=6𝐸+07𝑋+11594	0.9999	0.332~6.786	5.74	13.32
Butylidenephthalide	𝑌=9𝐸+07𝑋+420771	0.9991	0.033~2.543	5.12	12.73