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A Semi-Continuous Process For Polyphenols Extraction From Sea Buckthorn Leaves
Ioana Asofiei1, Ioan Calinescu1, Adrian Trifan1
1Faculty of Applied Chemistry and Materials Science, Department of Bioresources and Polymer Science, 1-7 Gh. Polizu, Bucharest, Romania.
Scientific Reports
|August 21, 2019
Summary
Sea buckthorn leaf extract, rich in polyphenols, can be efficiently obtained using a semi-continuous reactor. Microwave-assisted extraction (MAE) offers higher yield and lower energy use than conventional methods.
Area of Science:
- Phytochemistry
- Chemical Engineering
- Natural Product Extraction
Background:
- Sea buckthorn (Hippophae Rhamnoides L.) leaves are a valuable source of bioactive compounds, including antioxidants, vitamins, and minerals.
- Previous research indicates sea buckthorn leaf extracts possess antimicrobial, antioxidant, anti-inflammatory, and antiviral properties.
- Polyphenols are key bioactive compounds in sea buckthorn, contributing to its health benefits.
Purpose of the Study:
- To describe the extraction of polyphenols from sea buckthorn leaves using a semi-continuous small-scale reactor.
- To investigate the influence of various extraction parameters on polyphenol yield and quality.
- To compare the efficiency and energy consumption of microwave-assisted extraction (MAE) with conventional extraction (CE).
Main Methods:
- Extraction of polyphenols from sea buckthorn leaves using a semi-continuous reactor.
- Optimization of extraction parameters: residence time, solvent flow rate, stirring rate, reactor type, and solvent pre-heating.
- Analysis of extracts for total phenolic content (TPC), antioxidant capacity, and main phenolic compounds using HPLC.
- Comparison of energy consumption between MAE and CE.
Main Results:
- Total phenolic content (TPC) increased with higher stirring rates.
- Pre-heating the solvent improved yield and reduced residence time.
- Antioxidant capacity correlated positively with TPC.
- Semi-continuous MAE preserved the composition of phenolic compounds.
- MAE demonstrated significantly lower energy consumption compared to CE.
Conclusions:
- Semi-continuous reactor extraction is effective for obtaining high-quality polyphenols from sea buckthorn leaves.
- Optimizing parameters like solvent pre-heating and stirring rate enhances extraction efficiency.
- Microwave-assisted extraction (MAE) is a superior method for sea buckthorn polyphenol extraction due to its efficiency and reduced energy demand.
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