<rdf:RDF xmlns:rdf="http://www.openarchives.org/OAI/2.0/rdf/" xmlns:ow="http://www.ontoweb.org/ontology/1#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:ds="http://dspace.org/ds/elements/1.1/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:doc="http://www.lyncode.com/xoai" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/rdf/ http://www.openarchives.org/OAI/2.0/rdf.xsd">
   <ow:Publication rdf:about="oai:digibug.ugr.es:10481/102487">
      <dc:title>A novel sustainable approach for the extraction of value-added compounds from hibiscus sabdariffa l. calyces by natural deep eutectic solvents</dc:title>
      <dc:creator>Alañón, María Elena</dc:creator>
      <dc:creator>Ivanovic, M.</dc:creator>
      <dc:creator>Pimentel Moral, Sandra</dc:creator>
      <dc:creator>Borras Linares, María Isabel</dc:creator>
      <dc:creator>Arráez Román, David</dc:creator>
      <dc:creator>Segura Carretero, Antonio</dc:creator>
      <dc:subject>Natural deep eutectic solvents (NADES)</dc:subject>
      <dc:subject>Hibiscus sabdariffa L.</dc:subject>
      <dc:subject>Value-added compounds</dc:subject>
      <dc:subject>Green extraction</dc:subject>
      <dc:subject>Microwave-assisted extraction</dc:subject>
      <dc:description>Hibiscus sabdariffa L. is widely acknowledged as an important source of value-added compounds as natural&#xd;
pigments and bioactive compounds whose isolation is of great interest in food industry. Due to the incessant&#xd;
demand of green extraction procedures, NADESs have emerged in the last years as new green solvents alternative&#xd;
to the conventional organic ones. The feasibility of NADESs for the extraction of value-added compounds of H.&#xd;
sabdariffa has been assessed in this work for the first time. An extraction technique based on microwave assisted&#xd;
extraction (MAE) and the use of NADESs was proposed testing different deep eutectic solvents based on choline&#xd;
chloride (ChCl). Among them, oxalic acid based NADES exhibited a great selectivity for anthocyanins in particular&#xd;
as well as higher extraction yields of bioactive compounds was also observed, even greater than those&#xd;
observed by methanol. The effect of extraction variables such as liquid-solid ratio, temperature and water&#xd;
percentage were studied by Box-Behnken design and a response surface methodology. The statistical program&#xd;
pointed out the liquid-solid ratio of 1:30 mL mg−1, temperature of 75 °C and a water percentage of 55% as the&#xd;
conditions to maximize extraction within the experimental domain. Hence, NADES composed by oxalic acid and&#xd;
choline chloride resulted to be an effective green alternative tailor-made solvent to carry out selective extractions&#xd;
of value-added compounds from H. sabdariffa.</dc:description>
      <dc:date>2025-02-19T09:45:38Z</dc:date>
      <dc:date>2025-02-19T09:45:38Z</dc:date>
      <dc:date>2020-08-24</dc:date>
      <dc:type>journal article</dc:type>
      <dc:identifier>Food Research International 2020, 137 (109646)</dc:identifier>
      <dc:identifier>https://hdl.handle.net/10481/102487</dc:identifier>
      <dc:identifier>10.1016/j.foodres.2020.109646</dc:identifier>
      <dc:language>eng</dc:language>
      <dc:rights>http://creativecommons.org/licenses/by-nc-nd/4.0/</dc:rights>
      <dc:rights>open access</dc:rights>
      <dc:rights>Attribution-NonCommercial-NoDerivatives 4.0 Internacional</dc:rights>
      <dc:publisher>Elsevier</dc:publisher>
   </ow:Publication>
</rdf:RDF>