Extraction of Rosehip Seed Oil Using Supercritical Fluids

Significance of the Topic

Rosehip seed oil is highly valued in the cosmetic and nutraceutical industries for its rich composition of fatty acids and antioxidants. Conventional solvent-based extraction methods are labor-intensive, time-consuming, and involve large volumes of hazardous chemicals. Supercritical fluid extraction (SFE) with CO2 emerges as a sustainable alternative that reduces solvent use and processing time while maintaining high-quality oil yields.

Objectives and Study Overview

This study investigates the performance of the Applied Separations Spe-ed SFE system for extracting oil from ground rosehip seeds. The primary objectives are to compare extraction time, yield, accuracy, and precision against the standard Soxhlet method (AOAC 926.12), and to demonstrate a solvent-free workflow suitable for routine laboratory and industrial applications.

Methodology and Instrumentation

• Sample preparation: 13 g of finely ground rosehip seeds, weighed to ±0.1 mg.
• Packing: Spe-ed Wool plugs at inlet and outlet, Spe-ed Matrix to fill vessel voids.
• Extraction vessel: 24 mL capacity.
• Extraction parameters:
  • Pressure: 10 000 psi
  • Temperature: 70 °C (valve at 120 °C)
  • CO2 flow rate: 3 L/min (gas equivalent)
  • Dynamic extraction time: 15 minutes
• Instrumentation: Spe-ed SFE Supercritical Extraction System with industrial-grade CO2.
• Collection and post-processing: Oil collected in pre-weighed vial; residual moisture removed by drying to constant weight per AOAC 926.12.

Main Results and Discussion

The supercritical CO2 method achieved oil yields comparable to Soxhlet extraction but reduced extraction time from several hours to 15 minutes. Precision and accuracy of the SFE approach matched the reference method, and elimination of organic solvents simplified waste handling and improved laboratory safety. The rapid, reproducible extraction underscores SFE’s suitability for high-throughput analysis.

Benefits and Practical Applications

• Eliminates hazardous solvent use, enhancing operator safety and reducing disposal costs.
• Significantly shortens extraction time, boosting laboratory efficiency.
• Maintains regulatory compliance and quality standards for cosmetic and food ingredients.
• Adaptable to both research laboratories and industrial processing scales.

Future Trends and Applications

Emerging developments include mathematical modeling for process optimization, integration of in-line analytical detection, and scale-up to pilot and production scales. SFE can be extended to isolate a wider range of bioactive compounds from various plant matrices, supporting green chemistry and sustainable manufacturing initiatives.

Conclusion

Supercritical CO2 extraction using the Spe-ed SFE system offers a fast, precise, and solvent-free method for rosehip seed oil analysis. This approach aligns with industry trends toward sustainability and operational efficiency, providing results equivalent to traditional solvent methods in a fraction of the time.

References

Reverchon E, Kaziunas A, Marrone C. Supercritical CO2 Extraction of Hiprose Seed Oil: Experiments and Mathematical Modeling. Chemical Engineering Science. 2000;55:2195-2201.