Research on standard decoction of ginger juice Magnoliae Officinalis Cortex / 中草药

ABSTRACT

Objective To study the dry extract rate, determination and transfer rate of maker compounds, and fingerprint of standard decoction of ginger juice Magnoliae Officinalis Cortex (GJMOC) and provide a reference for the preparation and quality assessment of its dispensing granules by establishing 16 batches of standard decoction of GJMOC. Methods A total of 16 batches of GJMOC standard decoctions were prepared following literature requirements. The quantitative analysis method of magnolol and honokiol was according to Chinese Pharmacopoeia (2015 edition). The transfer rate of total magnolol and honokiol and extraction rate were calculated. the pH value was determined and HPLC fingerprint was established under a flow rate of 1 mL/min and eluted with a mobile phase of acetonitrile (A)-0.1% phosphoric acid solution (B) in a gradient mode (0-15 min, 12%-16% A; 15-30 min, 16%-28% A; 30-42 min, 28%-74% A; 42-55 min, 74%-80% A). The column temperature was set at 40℃ and the detection wavelength was 294 nm. Results By measuring the of 16 batches of standard decoction, the transfer rate of the sum of magnolol and honokiol ranged from 6.5% to 12.0%, the extraction rate was at a range of 3.41% to 7.14% and pH value was 4.63 to 5.43. The Similarity Evaluation System for Chromatographic Fingerprint of Traditional Chinese Medicine (2012A) was used to analyze and compare the fingerprints, and seven common peaks were determined and four were identified including magnoloside B (peak 1), magnoloside A (peak 2), honokiol (peak 6), and magnolol (peak 7). The similarity among 16 batches of standard decoction of GJMOC was evaluated, and the similarity was all greater than 0.69. Moreover, this study established an HPLC fingerprint analysis method of GJMOC standard decoction. Conclusion The preparation method established in this study is stable and feasible, and the analysis method shows good precision, stability, and repeatability in fingerprint analysis and it is suitable for evaluating the quality of standard decoction of GJMOC.