High-efficient extraction of principal medicinal components from fresh Phellodendron bark (cortex phellodendri)

Area of Science:

• Pharmacognosy
• Natural Product Chemistry
• Traditional Chinese Medicine

Background:

• Phellodendron bark is a vital herb in Traditional Chinese Medicine.
• It contains key medicinal compounds: phellodendrine, berberine, and palmatine.
• Efficient extraction methods are crucial for maximizing these compounds' yield.

Purpose of the Study:

• To investigate optimal extraction technologies for Phellodendron bark.
• To compare different extraction methods and solvent combinations.
• To determine the most effective technique for isolating phellodendrine, berberine, and palmatine.

Main Methods:

• Investigated various extraction methods including distillation, soxhlet extraction, and ultrasonic extraction.
• Compared the efficacy of single solvents versus combined solvents.
• Utilized hydrochloric acid/methanol as a combined solvent system with ultrasonic extraction.

Main Results:

• Combined solvents demonstrated superior extraction efficiency compared to single solvents.
• Ultrasonic extraction significantly outperformed distillation and soxhlet extraction.
• Hydrochloric acid/methanol-ultrasonic extraction yielded the highest amounts of the target compounds.

Conclusions:

• Hydrochloric acid/methanol-ultrasonic extraction is the most effective method for fresh Phellodendron bark.
• This method provides high yields: 103.12 mg/g berberine, 24.41 mg/g phellodendrine, and 1.25 mg/g palmatine.
• The findings support optimized production of Phellodendron-derived medicinal agents.