Continuous or Batch Solid-Liquid Extraction of Antioxidant Compounds from Seeds of Sterculia apetala Plant and Kinetic Release Study.
Continuous or Batch Solid-Liquid Extraction of Antioxidant Compounds from Seeds of Sterculia apetala Plant and Kinetic Release Study.
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DOI：
10.3390/molecules23071759
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发表时间：
2018-07-18
期刊：
影响因子：
--
通讯作者：
Almajano MP
中科院分区：
文献类型：
--
作者：
Mosca F;Hidalgo GI;Villasante J;Almajano MP
本研究旨在研究从无瓣小檗（一种中美洲植物）种子中提取的化合物的抗氧化特性，以便为现有文献中有关该植物有益特性的研究提供进一步的结果。采用不同的提取方法，如分批提取或连续提取条件，以水或50%乙醇为溶剂。动力学研究可以估计连续固液萃取的有效扩散系数，突出了扩散速率与温度和溶剂种类的严格依赖关系，在60°C时，当乙醇含量为50%时，扩散速率最高。通过对不同工艺和两种溶剂的比较，选择水作为最佳的提取溶剂，而分批机械搅拌提取是最有效的提取方式，具有使用环保溶剂和减少处理时间的优点，可以获得大量的酚类化合物。采用ABTS法和Folin-Ciocalteau法测定其抗氧化活性和总酚含量（TPC）。此外，从无瓣小檗种子中提取不同的脂肪酸，并进行气相色谱分析，以定量除抗氧化剂外的其他有趣的化学物质。
This work has been intended to investigate the antioxidant properties of compounds extracted from seeds of Sterculia apetala (a plant from Central America) in order to add further results to the relatively poor existing literature on the beneficial properties of this plant. Different extraction methodologies were used such as batch or continuous extraction conditions using water or ethanol 50% as solvents. The kinetic study has allowed estimation of the effective diffusion coefficients in a continuous solid-liquid extraction, highlighting the strict dependence of the diffusion rate and temperature and kind of solvent, showing the highest diffusion rate with ethanol 50% at 60 °C. The comparison between different techniques and two solvents led to the selection of water as the best extraction solvent while batch mechanically-agitated extraction was the most efficient mode, with the benefits of use of an environmental-friendly solvent and reduction in process time to achieve a high amount of extracted phenolic compounds. The analysis techniques used were ABTS and Folin-Ciocalteau methods to investigate the antioxidant activity and quantify the Total Phenolic Content (TPC) respectively. Also, different fatty acids were extracted from Sterculia apetala seeds and analysed by Gas Chromatography in order to quantify other interesting chemical species besides antioxidants.
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