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Efficient extraction of hydrophilic and lipophilic antioxidants from microalgae with supramolecular solvents

机译：用超分子溶剂的微藻脂肪萃取亲水性和亲脂性抗氧化剂

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There is strong evidence that lipophilic and hydrophilic antioxidants interact in vivo through different mechanisms and that it is their mixed effects what leads to health benefits. Simultaneous extraction of both types of antioxidants from biomass using organic solvents is inefficient because extraction yields for these phytochemicals are highly dependent on the polarity of the solvent. In this work, we firstly propose the use of supramolecular solvents (SUPRAS) as an innovative approach for the simultaneous extraction of a wide polarity range of antioxidants. Different SUPRAS compositions were investigated for extraction of the total content of carotenoids and polyphenols, as representatives of lipophilic and hydrophilic antioxidants, respectively. Under optimal conditions, antioxidants were extracted from freeze-dried biomass of Scenedesmus sp. in an excellent rate related to their total content (up to 1 mg carotenoids/g dw and 10 mg of gallic acid equivalents, GAE/g dw). Screening based on liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS) revealed that lutein was the major carotenoid and caffeic acid the main phenolic compound. The SUPRAS extracts showed high antioxidant activity (25.04 +/- 0.73 mu M ascorbic acid equivalents antioxidant capacity, AAAC/g dw and 17.02 +/- 0.45 mu M AAAE/g dw for ABTS and DPPH assays, respectively). SUPRAS offered advantages in terms of non-toxicity, rapidity (5 min extraction) and cost-effectiveness (room temperature, atmospheric pressure) for the recovery of antioxidant compounds from algal biomass and constitute a good alternative to the use of conventional solvents.
机译：有很大的证据表明，亲水性和亲水性抗氧化剂通过不同的机制在体内互动，并且它们的混合效应是导致健康益处的影响。通过使用有机溶剂同时提取两种类型的抗氧化剂的抗氧化剂是低效的，因为这些植物化学物质的提取产率高度依赖于溶剂的极性。在这项工作中，我们首先提出了使用超分子溶剂（Supras）作为同时提取抗氧化剂宽极性范围的创新方法。研究了不同的Supras组合物，用于提取类胡萝卜素和多酚的总含量，作为亲脂性和亲水性抗氧化剂的代表。在最佳条件下，从Scenedesmus SP的冷冻干燥的生物质中提取抗氧化剂。以优异的速率与其总含量有关（最多1毫克类胡萝卜素/ G DW和10毫克的小酸当量，GAE / G DW）。基于液相色谱的筛选偶联至串联质谱（LC-MS / MS）显示叶黄素是主要的酚类化合物主要类胡萝卜素和咖啡酸。 Supras提取物显示出高抗氧化活性（25.04 +/-0.73μm抗坏血酸当量抗氧化能力，AAAC / G DW和17.02 +/-0.45μmaaae / g dw分别用于ABTS和DPPH测定）。 Supras在非毒性，快速（5分钟提取）和成本效益（室温，大气压）方面提供了优势，用于从藻类生物量回收抗氧化剂化合物，并构成使用常规溶剂的良好替代方案。

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    Keddar M. N.; Ballesteros-Gomez A.; Amiali M.; Siles J. A.; Zerrouki D.; Martin M. A.; Rubio S.;

  • 作者单位

    Natl High Sch Agron ES1603 Lab Food Technol &

    Human Nutr 1 Ave Hassan Badi Algiers 16200 Algeria;

    Univ Cordoba Inst Fine Chem &

    Nanochem Dept Analyt Chem Marie Curie Bldg Annex Campus Rabanales Cordoba 14071 Spain;

    Natl High Sch Agron ES1603 Lab Food Technol &

    Human Nutr 1 Ave Hassan Badi Algiers 16200 Algeria;

    Univ Cordoba Dept Inorgan Chem &

    Chem Engn Marie Curie Bldg Ground Floor Campus Rabanales Cordoba 14071 Spain;

    Univ Ouargla Fac Sci Appl Lab Dynam Interact &

    Reactivites Syst BP 511 Route Ghardaia Ouargla 30000 Algeria;

    Univ Cordoba Dept Inorgan Chem &

    Chem Engn Marie Curie Bldg Ground Floor Campus Rabanales Cordoba 14071 Spain;

    Univ Cordoba Inst Fine Chem &

    Nanochem Dept Analyt Chem Marie Curie Bldg Annex Campus Rabanales Cordoba 14071 Spain;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 分离过程;气化工艺;
  • 关键词

    Supramolecular solvent (SUPRAS); Microalgae; Carotenoids; Polyphenols; Antioxidant;

    机译：超分子溶剂（Supras）;微藻;类胡萝卜素;多酚;抗氧化剂;

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