Novel Method to Produce Emulsions Containing Essential Oils from Saponin-Rich Pressurized Aqueous Plant Extracts

Author(s)

Santos, Diego T. ; Barbosa, Dayane F. ; Vardanega, Renata ; Gomes, M. Thereza M. S. ; Meireles, M. Angela A.

• Document type: Journal article
• Source: JOURNAL OF COLLOID SCIENCE AND BIOTECHNOLOGY; v. 2, n. 2, p. 7-pg., 2013-06-01.

Abstract

In this work, a novel on-line process for production of emulsions in one step containing essential oils from saponin- rich pressurized aqueous plant extracts was developed. Named by our research group as Emulsion from Pressurized Liquid Extraction (EPLE) the feasibility of this process was demonstrated under optimum PLE conditions (12MPa), temperature of 393 K (120 degrees C) and 10 min of static time) using Pfaffia glomerata roots as source of saponin-rich extract, water as extracting solvent and clove essential oil as a model dispersed phase. The optimization study of PLE was performed with extraction pressure (12 MPa), temperature (353-433 K) and static extraction time (5-15 min) as independent variables. Only the extraction temperature influenced significantly the extraction yield and extract emulsification index. As expected, the essential oil/ aqueous solution (extract dissolved in water) ratio had a strong influence on the emulsion droplet size (d(32)), and as this ratio is increased, the d32 increases as well, being formed clove essential oil-based emulsions with a droplet size (d(32)) around 500 nm employing an essential oil/ aqueous solution ratio of 0.025. (AU)

• FAPESP's process: 12/10685-8 - Combination and coupling of processes for the production and encapsulation of value-added vegetal extracts: technical and economic evaluation
• Grantee: Maria Angela de Almeida Meireles Petenate
• Support Opportunities: Regular Research Grants
• FAPESP's process: 12/19304-7 - Brazilian ginseng biorefinery: simulation and multi-objective optimization
• Grantee: Diego Tresinari dos Santos
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• FAPESP's process: 10/16485-5 - Technical and economic evaluation of the integration of sustainable processes for a better use of brazilian ginseng (Pfaffia glomerata)
• Grantee: Diego Tresinari dos Santos
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 09/17234-9 - Obtaining anthocyanins, carotenoids, flavonoids, volatile oils, and tocotrienols by supercritical technology: process parameters and chemical characterization of extracts
• Grantee: Maria Angela de Almeida Meireles Petenate
• Support Opportunities: Regular Research Grants