Objective  To establish the characteristic chromatogram for modified Huoxiang Zhengqi pills and determine the content of three components based on HPLC.

Methods  The analysis of methanol extract of this preparation was performed on a Agilent TC-C₁₈ column (250 mm×4.6 mm, 5 μm) at 30 ℃, with mobile phase comprising of acetonitrile-0.1% phosphoric acid flowing at 1.0 mL/min in a gradient elution manner, and the detection wavelength was set at 254 nm and 284 nm.

Results  Three components (hesperidin, magnolol and honokiol ) showed good linearity within the range of 2.715-434.400 μg/mL, 2.760-176.600 μg/mL and 2.623-167.900 μg/mL (r=1.000 0), whose average recoveries were 99.2%, 96.3% and 95.9%, with the RSD of 1.5%, 1.3% and 1.8% (n=9), respectively. The established characteristic chromatogram controlled the 7 main Chinese medicinal herbs in the formulation, which provided a basis for evaluating the quality of raw materials, feedings, processes and preparations of different enterprises as a whole.

Conclusion  This method is accurate, reliable and has good repeatability, and can be used for the quality control of modified Huoxiang Zhengqi pills.

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