[Study on optimizing extraction process of root of Polygonum multiflorum].

Area of Science:

• Phytochemistry
• Natural Product Chemistry
• Pharmacognosy

Background:

• Polygoni multiflori root is a traditional Chinese medicine with significant biological activities.
• 2,3,4,5-tetrahydroxystilbene-2-O-beta-D-glucoside is a key active compound in P. multiflori.
• Understanding the extraction process is crucial for maximizing its therapeutic potential.

Purpose of the Study:

• To optimize the extraction method for Polygoni multiflori root.
• To determine the optimal conditions for extracting 2,3,4,5-tetrahydroxystilbene-2-O-beta-D-glucoside.
• To validate the relationship between antioxidant capacity and the concentration of this glucoside.

Main Methods:

• Orthogonal experimental design was employed to optimize extraction parameters.
• High-Performance Liquid Chromatography (HPLC) was used to quantify 2,3,4,5-tetrahydroxystilbene-2-O-beta-D-glucoside.
• Photochemiluminescence (PCL) detection measured the antioxidative capacity.

Main Results:

• Ethanol concentration and extraction times significantly influenced both the glucoside content and antioxidant capacity.
• The study identified key factors affecting the extraction efficiency of active compounds.
• A correlation between the extracted glucoside and antioxidant activity was observed.

Conclusions:

• The optimal extraction procedure involves three sequential extractions of 1.5 hours each, using a 10-fold volume of 60% ethanol at 85°C.
• This optimized method maximizes the extraction of 2,3,4,5-tetrahydroxystilbene-2-O-beta-D-glucoside.
• The findings provide a scientific basis for the effective utilization of Polygoni multiflori root.