Simultaneous determination of phenolic acids and phthalide compounds by liquid chromatography for quality assessment of rhizoma cnidii

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Abstract

This paper describes a simple, rapid, and validated reversed-phase high-performance liquid chromatographic method developed for the determination of 4 major bioactive constituents, namely, chlorogenic acid, ferulic acid, senkyunolide A, and Z-ligustilide in Rhizoma Cnidii extract. A Capcell Pak Cis chromatographic column (150 × 4.6 mm, 3 μm) was used with mobile phases consisting of 0.1% formic acid, acetonitrile, and methanol at a flow rate of 0.8 mL/min and UV detection at 285 nm. Comprehensive validation of the method included evaluation of linearity, repeatability, recovery, and stability. Excellent linear behavior (r2 >0.99) was observed over the concentration range of 2-100 μg/mL for the compounds under investigation. Repeatability and accuracy were evaluated by intra- and interday assays; the relative standard deviation (RSD) values were <5.37% and accuracies ranged from 97.1 to 104.9%. Recoveries of the compounds ranged from 94.2 to 104.2% with RSD values of <9.50%. The developed method was successfully applied to the analysis of ethanolic extracts of Rhizoma Cnidii samples. As a result, the concentrations of chlorogenic acid, ferulic acid, Z-ligustilide, and senkyunolide A were determined to be 0.84-5.35, 0.45-1.65, 0.74-4.39, and 0.32-1.14 mg/g herb, respectively. Thus, the developed method was found to be accurate and reproducible and is considered suitable for the qualitative and quantitative analysis of Rhizoma Cnidii for bioactive compounds.

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Islam, M. N., Yoo, H. H., Sung, C. K., Dong, M. S., Park, Y. I., Jin, C., & Kim, D. H. (2009). Simultaneous determination of phenolic acids and phthalide compounds by liquid chromatography for quality assessment of rhizoma cnidii. Journal of AOAC International, 92(2), 375–381. https://doi.org/10.1093/jaoac/92.2.375

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