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    Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10259/6094

    Título
    Maximizing the freeze-dried extract yield by considering the solvent retention index: extraction kinetics and characterization of Moringa oleifera leaves extracts
    Autor
    Kashaninejad, Mansoore
    Blanco Alcalde, BeatrizUBU authority Orcid
    Benito Román, OscarUBU authority Orcid
    Beltrán Calvo, SagrarioUBU authority Orcid
    Niknam, S.Mehdi
    Sanz Díez, Mª TeresaUBU authority Orcid
    Publicado en
    Food and Bioproducts Processing. 2021, V. 130, p. 132-142
    Editorial
    Elsevier
    Fecha de publicación
    2021-11
    ISSN
    0960-3085
    DOI
    10.1016/j.fbp.2021.09.008
    Abstract
    A complete chemical characterization of Moringa oleifera leaves was carried out showing a high content of extractives. Extraction kinetics of bioactive compounds present in this fraction were performed by conventional and ultrasound assisted extraction (UAE). A 50% (v/v) hydroalcoholic mixture led to the highest total phenolic compounds yield by conventional solvent extraction, 29.5 ± 0.3 mg per gram of moringa leaves. UAE did not bring any improvement when using hydroalcoholic mixtures probably due to the physical properties of the ethanol aqueous mixtures that affect the UAE performance, such as viscosity and vapor pressure of the mixture. The retention index of the different solvents in the raffinate phase was determined revealing the highest retention index for water, 9.5, and a continuous decrease by increasing ethanol concentration. Retention index is a key parameter in a solvent extraction process since it determines the number of stages in an industrial separation process and it is not usually reported in bioactive compounds extraction. Solvent extraction capacity and the retention index determined the final freeze-dried extract yield.
    Palabras clave
    Moringa leaves
    Phenolic compounds
    Solvent retention
    Kinetic model
    Freeze-dried extracta
    Materia
    Ingeniería química
    Chemical engineering
    URI
    http://hdl.handle.net/10259/6094
    Versión del editor
    https://doi.org/10.1016/j.fbp.2021.09.008
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