Ruíz-García Yineth, Beres Carolina, Chávez Davy W H, Souza Erika F, Tonon Renata V, Cabral Lourdes M C
1Universidade Federal Rural do Rio de Janeiro (UFRRJ) - Programa de Pós-Graduação em Ciência e Tecnologia de Alimentos, Rodovia BR 465 - km 7, Campus Universitário - Seropédica, Rio de Janeiro, RJ 23851-970 Brazil.
2Embrapa Agroindústria de Alimentos, Rio de Janeiro, RJ Brazil.
J Food Sci Technol. 2019 Feb;56(2):1066-1072. doi: 10.1007/s13197-018-3535-x. Epub 2019 Jan 21.
The aim of this study was to evaluate the effects of process conditions on the solid-liquid extraction of bioactive compounds from the Alicante Bouschet grape skin from the semi-arid region of Brazil. The influence of temperature (23-57 °C), ethanol concentration (16-84%) and citric acid concentration (0-4%) on the total phenolic content, monomeric anthocyanin content and on the antioxidant capacity of the extracts measured by oxygen radical absorbance capacity and cation radical scavenging activity (ABTS) methods was investigated. Ethanol concentration and temperature had a significant influence on total phenolic compounds extraction and antioxidant capacity while monomeric anthocyanins extraction was only affected by ethanol concentration. The conditions selected as the most adequate for the extraction were: temperature of 40 °C, 50% v/v ethanol and 2% m/v citric acid.
本研究的目的是评估工艺条件对从巴西半干旱地区的阿利坎特布谢葡萄皮中提取生物活性化合物的固液萃取效果的影响。研究了温度（23 - 57°C）、乙醇浓度（16 - 84%）和柠檬酸浓度（0 - 4%）对提取物中总酚含量、单体花青素含量以及通过氧自由基吸收能力和阳离子自由基清除活性（ABTS）方法测定的抗氧化能力的影响。乙醇浓度和温度对总酚类化合物的提取和抗氧化能力有显著影响，而单体花青素的提取仅受乙醇浓度的影响。选择的最适宜提取条件为：温度40°C、乙醇体积分数50%和柠檬酸质量体积分数2%。
