de Souza Caroline G, Rodrigues Tigressa Hs, E Silva Lorena Ma, Ribeiro Paulo Rv, de Brito Edy S
Departamento de Engenharia Química, Universidade Federal do Ceará, Fortaleza, CE, Brazil.
Embrapa Agroindústria Tropical, Pici, Fortaleza, CE, Brazil.
J Sci Food Agric. 2018 Mar;98(4):1362-1368. doi: 10.1002/jsfa.8601. Epub 2017 Sep 7.
Passion fruit rind (PFR) represents 90% of the total fruit weight and is wasted during juice processing. Passion fruit rind is known to contain flavonoids and pectin. An alternative use for this fruit juice industrial residue is to obtain these compounds. This study aimed to verify the influence of pressurized solvent extraction (PSE) or ultrasound assisted extraction (UAE) of flavonoid and pectin in a sequential process.
The PSE using ethanol at 60:40 (v/v) yielded a total polyphenol content of 4.67 g GAE kg PFR, orientin-7-O-glucoside (1.57 g kg PFR) and luteolin-6-C-glucoside (2.44 g kg PFR). Pectin yield was 165 g kg PFR, either in PSE or UAE. Pectin characterization indicates that the pectic structure has basically homogalacturonans and galacturonate followed by a galacturonic acid ester unit, with methylation degree of 70%.
With this study it can be concluded that mixtures of alcohols with water favor the extraction of bioactive compounds of passion fruit peel. Both PSE and UAE were effective in sequentially extracting flavonoids and pectin. The preferred solvent is ethanol due to its lower toxicity. © 2017 Society of Chemical Industry.
西番莲果皮（PFR）占果实总重量的90%，在果汁加工过程中被废弃。已知西番莲果皮含有黄酮类化合物和果胶。这种果汁工业残渣的另一种用途是获取这些化合物。本研究旨在验证在连续过程中加压溶剂萃取（PSE）或超声辅助萃取（UAE）对黄酮类化合物和果胶的影响。
使用60:40（v/v）乙醇的PSE法得到的总多酚含量为4.67 g GAE/kg PFR，其中定向菌素-7-O-葡萄糖苷（1.57 g/kg PFR）和木犀草素-6-C-葡萄糖苷（2.44 g/kg PFR）。无论是PSE法还是UAE法，果胶产量均为165 g/kg PFR。果胶表征表明，果胶结构主要为同型半乳糖醛酸聚糖和半乳糖醛酸，随后是半乳糖醛酸酯单元，甲基化程度为70%。
通过本研究可以得出结论，醇与水的混合物有利于西番莲果皮生物活性化合物的提取。PSE法和UAE法在依次提取黄酮类化合物和果胶方面均有效。由于毒性较低，首选溶剂为乙醇。©2017化学工业协会。
