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首页> 外文期刊>Separation and Purification Technology >Extraction of hydrolysable tannins from Phyllanthus niruri Linn.: Effects of solvents and extraction methods
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Extraction of hydrolysable tannins from Phyllanthus niruri Linn.: Effects of solvents and extraction methods

机译：楠木中可水解单宁的提取：溶剂和提取方法的影响

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摘要

Effects of solvent types and extraction methods (solvent extraction (SE),supercritical fluid extraction (SFE) and pressurized water extraction (PWE)) were investigated for effective recovery of bioactive hydrolysable tannins from Phyllanthus niruri Linn.Various organic and aqueous solvents screened by Soxhlet method showed that the gallic acid and ellagic acid contents increased with water content whereas corilagin yield reached a maximum value at 30% (v/v) ethanol in water.At a fixed temperature,solvent extraction by Soxhlet is the best method for gallic and ellagic acid extractions,whereas pressurized methods are better for the corilagin extraction.Even though exhaustive extraction is achieved fastest by PWE,SFE with the addition of ethanol-water cosolvent is superior in terms of low liquid solvent consumption and component fractionation produced.Solvent polarity,solvent-to-solid ratio and contact time play significant roles in determining the most efficient method for tannin extraction.
机译：考察了溶剂类型和提取方法（溶剂提取（SE），超临界流体提取（SFE）和加压水提取（PWE））对有效地回收楠竹中生物活性可水解单宁的影响。索氏提取法筛选了各种有机和水性溶剂方法表明，没食子酸和鞣花酸的含量随含水量的增加而增加，而在水中乙醇含量为30％（v / v）的情况下，可乐豆素的收率达到最大值。在固定温度下，用索氏萃取法提取胆汁和鞣花酸是最好的方法酸萃取，而加压法更适合于胶凝素萃取。即使通过PWE进行彻底萃取，添加乙醇-水助溶剂的SFE在降低液体溶剂消耗和产生组分分馏方面也具有优势。溶剂极性，溶剂固比和接触时间在确定最有效的单宁提取方法中起着重要作用离子。

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