Selective extraction of saponins from Ilex paraguariensis St.-Hil. unripe fruits

被引:7
|
作者
Finkler da Silua, Caroline Garcia [1 ,2 ]
Cassel, Eduardo [1 ]
Figueiro Vargas, Ruben Mario [1 ]
Ferreira Marczak, Ligia Damasceno [2 ]
机构
[1] Pontificia Univ Catolica Rio Grande do Sul, Dept Chem Engn, FENG, Ave Ipiranga 6681,Pr 30, Porto Alegre, RS, Brazil
[2] Fed Univ Rio Grande do Sul UFRGS, Chem Engn Dept, Rua Engenheiro Luiz Englert S-N, BR-90040040 Porto Alegre, RS, Brazil
关键词
Yerba mate; Saponins; Ultrasound; Moderate electric field; Pressurized liquid extraction; Mathematical modeling; ULTRASOUND-ASSISTED EXTRACTION; ELECTRIC-FIELD FREQUENCY; SUPERCRITICAL EXTRACTION; ANTIMICROBIAL ACTIVITY; VEGETABLE TISSUE; MATE; QUANTIFICATION; ANTIOXIDANT; LEAVES; ROOTS;
D O I
10.1016/j.fbp.2018.07.001
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
The unripe fruits of mate tree are an abundant source of saponins, known natural surfactants. The aim of this work was to evaluate non-conventional extraction techniques for the selective extraction of saponins from unripe fruits of yerba mate. Different ultrasound power (282-565 W cm(-2)) and electric field (25-50 V cm(-1)) intensities were assayed, as well as different solvent flow rates (1.67-2.78 x 10(-4) kgs(-1)) for pressurized liquid extraction applied to the fruits. In this study, the pressurized liquid extraction was more selective for saponins than ultrasound and electric field. At optimal conditions, the extraction using ultrasound and electric field resulted in yields of 6.42% and 6.83% of saponin equivalent per gram of extract, respectively. Although pressurized liquid extraction showed low brute extracts yields, it was highly selective for saponins, yielding up to 10.09%. Mathematical models, suitable for each extraction technique, were used to model the experimental data. (C) 2018 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码:72 / 82
页数:11
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