Decoction of single medicinal herb is a reference for the standardization of different dosage forms of Chinese medicine and it provides a new direction for solving the problems existing in the quality of Chinese medicinal granules such as no uniform dosage form and no clear quality standard. In this paper, the quality evaluation method of standard decoction of rhubarb was established to provide reference for the quality control of common dosage forms such as clinical decoction and formula granule. 10 batches of representative Rhei Radix et Rhizoma were collected to establish UPLC fingerprints were established. The chemical structures of main peaks were identified with ultra-performance liquid chromatography with quadrupole-time-of-flight mass spectrometry (UPLC-Q-TOF-MS) and the main components in the decoction were Anthraquinones. The extraction ratio of the standard decoction was (28.1±3.8)% and the transfer rate was (19.9±6.3)%. The method for the quality evaluation of standard decoction of Rhei Radix et Rhizoma was established in this study, providing reference for the quality control method of terminal products from decoction of Rhei Radix et Rhizoma.
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