Optimization of Hypericum Perforatum Microencapsulation Process by Spray Drying Method.

Area of Science:

• Food Science and Technology
• Pharmaceutical Sciences
• Natural Product Chemistry

Background:

• Hypericum perforatum (HP) possesses bioactive compounds with therapeutic potential.
• Encapsulation technology can protect these compounds and control their release.
• Gum arabic and maltodextrin were explored as wall materials for HP extract microencapsulation.

Purpose of the Study:

• To optimize microencapsulation parameters for Hypericum perforatum (HP) hydroalcoholic extract using response surface methodology (RSM).
• To evaluate the impact of microencapsulation on key quality attributes of HP extract.

Main Methods:

• Response Surface Methodology (RSM) was employed to determine optimal microencapsulation conditions.
• One-way ANOVA was used to screen three independent variables at three levels.
• Key responses monitored included total phenolic content (TPC), antioxidant activity (DPPH assay), Carr Index (CI), Hausner Ratio (HR), and solubility.

Main Results:

• Optimal conditions involved an inlet air temperature of 180°C, a maltodextrin to gum arabic ratio of 1.04:1, and a coating to core material ratio of 1.98:1.
• Optimized microcapsules exhibited a TPC of 316.53 mg/g GAE, 81.9% antioxidant activity, CI of 6.07, HR of 1.066, and 35.0% solubility.
• Scanning electron microscopy showed a mean particle diameter of 20.36 µm for the Hypericum perforatum microcapsules (HPMs).

Conclusions:

• Spray drying is a viable technique for microencapsulating HP extract, effectively protecting its bioactive compounds.
• The optimized microencapsulation process enhances the stability and applicability of HP extract.
• Microencapsulated HP holds promise for applications in the pharmaceutical, cosmetic, and food industries.