Fingerprint analysis of Flos Lonicerae japonicae using binary HPLC profiling

Area of Science:

• Pharmacognosy and Phytochemistry
• Analytical Chemistry
• Traditional Chinese Medicine

Background:

• Flos Lonicerae japonicae (Lonicera japonica Thunb.) is a crucial herb in Traditional Chinese Medicine.
• Accurate identification and quality control are essential due to potential adulteration with similar species.
• Chromatographic fingerprinting is a valuable tool for assessing the quality of herbal medicines.

Purpose of the Study:

• To develop standardized binary chromatographic profiling for Flos Lonicerae japonicae.
• To differentiate L. japonica from other related species and folk remedies.
• To correlate chromatographic peaks with in vitro bacteriostasis activity for quality assessment.

Main Methods:

• Standardized binary chromatographic profiling of aqueous and ethanolic extracts.
• Hierarchical cluster analysis for species differentiation.
• Correlation analysis to link chromatographic peaks with bacteriostasis activity.
• Development of two standard fingerprints using genuine L. japonica samples.

Main Results:

• Successful differentiation of L. japonica from other species using chromatographic profiles.
• Identification of six chromatographic peaks in ethanolic extract positively correlated with bacteriostasis activity.
• Demonstrated fair consistency of chromatographic profiles from various sources and harvests.
• Significant differences observed between L. japonica and other species.

Conclusions:

• Binary chromatographic fingerprinting provides a reliable method for identifying Flos Lonicerae japonicae.
• The developed fingerprints enable confirmative identification and quality assessment.
• Correlation analysis highlights key chemical markers associated with the herb's medicinal properties.