Study on the identification of: Pinelliae rhizoma and Pinelliae pedatisectae rhizoma based on the characteristic component triglochinic acid

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Abstract

For the first time, a monomeric compound, triglochinic acid, has been isolated from the tubers of Pinellia pedatisecta Schott with its structure analyzed using NMR. Its molecular formula is C7H8O6, with the chemical name (2E)-but-2-ene-1,2,4-tricarboxylic acid. Through HPLC-DAD and HPLC-MS analysis studies, it has concluded that Pinelliae rhizoma does not contain triglochinic acid, while Pinelliae pedatisectae rhizoma does. This key observation was used as a characteristic component to distinguish these two herbs. We analyzed 39 batches of Pinelliae rhizoma collected in herbal medicine market, among which triglochinic acid was detected in 27 batches, resulting in a adulteration ratio of Pinelliae rhizoma reaching 69.2%. Our method demonstrates great potential for authenticating the products, thus ensuring the quality of Pinelliae rhizoma.

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Jing, Y., Lai, Y., Chen, H., Li, M., Zhou, J., & Lan, Z. (2019). Study on the identification of: Pinelliae rhizoma and Pinelliae pedatisectae rhizoma based on the characteristic component triglochinic acid. RSC Advances, 9(21), 11774–11780. https://doi.org/10.1039/c9ra01626k

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