Abstract
A reliable analytical method based on high-performance liquid chromatography-ultraviolet detection was established for the determination of oleanonic acid (OA) content in Chios gum mastic (CGM). A simple method involving methanol extraction of CGM powder followed by basification and ether extraction was developed to isolate the triterpenic fraction including OA. The triterpenic fraction was chromatographed on a Phenomenex Gemini C18 column (150 × 4.6 mm, 5 µm) under a simple gradient elution of a mobile phase containing acetonitrile and water at a flow rate of 1.0 mL min−1. The detection wavelength was set at 210 nm. Good linearity was achieved in the range of 100.0–1000.0 μg mL−1 with r2 > 0.9993, and the limit of quantification was 32.22 μg mL−1. Accuracy measured at three concentration levels was in the range of 93.72–99.56%, while intra-day and inter-day precisions estimated using both OA standard and CGM samples were no more than 2.83 and 4.57% RSD, respectively. Finally, this method was applied to real CGM samples from various batches, revealing that the OA contents were between 88.13 and 100.83 μg mg−1. These results suggest that the current method can be applied as an efficient analytical method for quality control of CGM.
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Jin, Y., Zhao, J., Jeong, K.M. et al. A simple and reliable analytical method based on HPLC–UV to determine oleanonic acid content in Chios gum mastic for quality control. Arch. Pharm. Res. 40, 49–56 (2017). https://doi.org/10.1007/s12272-016-0853-2
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DOI: https://doi.org/10.1007/s12272-016-0853-2