Closed-loop spray drying with N₂ of Moringa oleifera leaf ethanolic extracts: Effects on bioactive compounds and antiradical activity

Abstract

Dried moringa (Moringa oleifera) extract was obtained by solid–liquid extraction from moringa fresh leaves with an ethanolic solution (80%) followed by closed-loop spray drying with N₂. This approach avoided the risk of explosion and environmental pollution upon drying. Spray drying was carried out with different inlet-outlet temperatures. Maltodextrin DE-10, β-cyclodextrin and precipitated silica were used as carrier materials. The highest statistically validated (p < 0.05) retentions (93% total phenolics and 48% ascorbic acid, 71% DPPH and 92% ABTS) were obtained with maltodextrin DE-10. The highest retentions of total carotenoids (72%) were obtained with precipitated silica.

GRAPHICAL ABSTRACT

Keywords:

• Antiradical activity
• bioactive compounds
• closed-loop spray drying
• Moringa ethanolic extracts
• ultrasound extraction

Additional information

Funding

The authors express their gratitude to the Mexican Consejo Nacional de Ciencia y Tecnología (CONACyT) for the scholarships provided to PhD students L.A. Vázquez-León and J.A. Olguín Rojas and to the Fondo Sectorial de Investigación para la Educación for the financial support through project no. CB-256084, as well as to Tecnológico Nacional de México (TNM) for the financial support through project no. 5922.16-P.