A Validated LC Method for Simultaneous Determination of Phenolic, Coumarin and Phthalide Compounds in the Ethanolic Extract of Angelica tenuissima

In this study, an LC method for the simultaneous determination of six bioactive compounds from Angelica tenuissima, namely chlorogenic acid, ferulic acid, Z-ligustilide, nodakenin, decursin and decursinol angelate was developed and validated. Chromatographic analysis was carried out on a C₁₈ column with a mobile phase consisting of 0.1% formic acid, methanol and acetonitrile at a flow rate of 0.8 mL min^?1 and the effluent from the column was monitored by UV detector at 325 nm. The excellent linear behavior was observed over the investigated concentration range for reported compounds. The intra- and inter-day precision over the concentration range of compounds were lower than 1.7% (as relative standard deviation), and accuracy was between 97.2 and 106.0%. These results showed that the developed method is accurate, reproducible, and consequently applicable for the quantitation of bioactive components from the ethanolic extract of Angelica tenuissima Nakai.