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超高压试验设备的用途

文章来源:/news/67.html 发表时间:2018-10-27
近几年的植物天然活性成分提取技能一直在向进步产品得率、降低有机试剂用量和添加提取功率的方向开展。在这样的前提下,超声波辅佐萃取、超临界流体萃取和微波辅佐提取等办法相继得到研讨和开展,超高压提取法则更为超卓,不只大大缩短了提取时刻、添加了提取功率,还具有可常温提取、提取物纯度高级优势,展现出巨大的开展潜力。
In recent years, the extraction technology of natural active ingredients from plants has been developing in the direction of improving the yield of products, reducing the amount of organic reagents and adding extraction power. Under such a premise, ultrasonic assisted extraction, supercritical fluid extraction and microwave assisted extraction methods have been studied and carried out one after another. Ultra-high pressure extraction method is more outstanding, not only greatly shorten the extraction time and add the extraction power, but also has room temperature extraction, extract purity advanced advantages, showing a huge. Development potential.
传统的物理、化学办法和酶法通过使生物细胞结构变性然后到达从细胞中提取成分的意图,可是传统的提取办法会使细胞组织结构损失选择性,从细胞内渗透出的不只要被提取成分还会混入较多杂质,导致提取成分很难与杂质别离。ZHANG等研讨发现运用超高压技能进行提取时,在高压条件下更多的提取溶剂会进入到细胞内,提取成分也会更多地渗透到细胞外,但只要少量杂质会混入提取成分中,因而提取物纯度得到大大进步。
Traditional physical, chemical and enzymatic methods denaturate the structure of biological cells and then arrive at the intention of extracting components from cells. However, traditional methods of extracting cells lose the selectivity of tissue structure. Not only the extracted components from cells but also more impurities are mixed into them, which makes it difficult to extract components and impurities. Do not leave. ZHANG and other studies have found that under high pressure conditions, more extracting solvents will enter the cell and more extracts will penetrate into the cell, but as long as a small amount of impurities will be mixed into the extract, so the purity of the extract has been greatly improved.
热回流提取、索氏提取、热水浸提等传统的提取办法在提取过程中一般需求较长的反应时刻,并且所得产品得率并不抱负,而超高压提取能够在缩短提取时刻的一起进步产品得率。研讨发现运用超高压技能从茶叶中提取茶多酚条件是:体积分数50%乙醇提取液、料液比1∶20(g∶mL)、压力500 MPa、保压时刻1 min,在这样的提取条件下所得到的茶多酚得率与超声萃取90 min或许热回流提取45 min附近,分别为30%、29%和31%。再者,部分植物中的天然活性成分具有热敏性,运用传统办法(如微波法)会形成提取成分损失活性,而超高压技能被称为“非热加工技能”,能够选择在常温条件下进行提取,很好地解决了这一问题。
The traditional extraction methods, such as hot reflux extraction, Soxhlet extraction and hot water extraction, generally require a long reaction time in the extraction process, and the yield of the product is not ambitious, but the ultra-high pressure extraction can improve the yield of the product with shorter extraction time. It was found that the conditions of extracting tea polyphenols from tea by ultra-high pressure technique were as follows: 50% ethanol extract, 1:20 (g:mL), 500 MPa pressure and 1 minute pressure holding time. Under these conditions, the yield of tea polyphenols was 30%, 29% and 45 min by ultrasonic extraction or heat reflux extraction, respectively. 31%. Moreover, some natural active ingredients in plants are heat-sensitive. Traditional methods (such as microwave method) can form the loss of activity of extracting components. Ultra-high pressure technology is called "non-thermal processing skills". It can be selected to extract at room temperature, which solves this problem well.
以上是超高压试验设备的用途,更多精彩内容点击:/,希望对您有所帮助!
Above is the use of ultra-high voltage test equipment, more exciting content click: /, I hope to help you!

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