文章基本信息

标题：Application of an ultrasound process to extract catechins from green tea wastes
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作者：Rosilene dos Santos Oliveira ; Juliana da Silva Rocha ; Keren Hapuque Pinheiro 等
期刊名称：Revista Brasileira de Pesquisa em Alimentos
印刷版ISSN：2179-3174
电子版ISSN：2236-6563
出版年度：2016
卷号：7
期号：3
页码：29-40
语种：Portuguese
出版社：Universidade Tecnológia Federal do Paraná
摘要：There is increasing need for industries to develop innovative technologies that in addition to being low cost, are also fast and provide high yields and efficiency, while at the same time avoiding adverse effects in the environment. One technique that conforms to these requirements is the use of ultrasound, which also offers ease of application and can be used in the extraction of compounds from leaves. The aim of the present work was to evaluate the efficiency of ultrasound in extracting catechins from green tea wastes, employing solvents with different polarities: water, acetone, ethanol, methanol, and isopropanol. The best extraction results were achieved using water as the solvent. Comparison was then made of extractions using water in the presence or absence of ultrasonication. The cavitation in the liquid medium, induced by the sound waves, acted to increase the permeability of the cell walls, leading to increased penetration of the solvent and greater extraction efficiency.
关键词：chá verde;ultrassom, catequinas