Quality assessment on Polygoni Multiflori Caulis using HPLC/UV/MS combined with principle component analysis

Area of Science:

• Traditional Chinese Medicine
• Phytochemistry
• Analytical Chemistry

Background:

• Polygoni Multiflori Caulis (PMC) is a traditional Chinese medicine with various health benefits.
• Significant variations in stem diameter exist among clinically used or marketed PMC.
• No prior research has investigated the relationship between PMC diameter and its quality.

Purpose of the Study:

• To investigate the correlation between the diameter of Polygoni Multiflori Caulis stems and their chemical composition.
• To establish diameter as a potential quality control parameter for PMC.

Main Methods:

• High-performance liquid chromatography (HPLC/UV/MS) for chromatographic fingerprinting.
• Quantitative analysis of key chemical constituents.
• Principal Component Analysis (PCA) for data interpretation.

Main Results:

• A significant correlation was identified between stem diameter and the content of 2,3,5,4 '-tetrahydroxystilbene-2-O-β-D-glucoside, a key quality marker.
• Principal Component Analysis effectively differentiated between qualified and unqualified PMC samples based on their chemical profiles.

Conclusions:

• Stem diameter can serve as a preliminary, visual criterion for assessing PMC quality.
• The findings provide a scientific basis for optimizing the collection time of PMC.
• PCA offers an efficient method for distinguishing high-quality PMC from substandard batches.