HPLC fingerprint determination method of cough relieving Bulbus fritillariae cirrhosae and loquat dripping pills
A technology for treating cough, Chuanbei loquat and determination method, which is applied in the field of medicine, and achieves the effect of high precision, good stability and easy mastering
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[0031] Embodiment 1: The method for determining the HPLC fingerprint of Chuanbei Piqua Dropping Pills
[0032] 1.1 Instruments and reagents
[0033] Instrument: Waters ACQUITY TM UPLC ultra-high performance liquid chromatography, Masslynx TM 4.0 workstation;
[0034] Chromatographic column: ACQUITY UPLC HSS T3, 1.8um, 2.1×100mm, Waters
[0035] Reagents: Methanol, acetonitrile, and formic acid are chromatographically pure (Fisher), water is ultrapure water, and other reagents are analytically pure.
[0036] 1.2 Preparation of reference solution
[0037] Chlorogenic acid (self-made, structure confirmed by MS, UV, FIR, and NMR) has a retention time of 7.99 minutes, which has a strong response under this condition, and can basically achieve baseline separation from the impurities before and after. Therefore, it is designated as the reference substance. Take an appropriate amount of chlorogenic acid, weigh it accurately, add methanol to prepare a solution containing 0.1 mg of ...
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