Vu Hang T, Scarlett Christopher J, Vuong Quan V
1School of Environmental and Life Sciences, University of Newcastle, 10 Chittaway Road, Ourimbah, NSW 2258 Australia.
2Faculty of Food Science and Technology, Vietnam National University of Agriculture, Trau Quy, Gia Lam, Hanoi, Vietnam.
J Food Sci Technol. 2019 Mar;56(3):1360-1370. doi: 10.1007/s13197-019-03610-2. Epub 2019 Feb 19.
Banana peel is rich in phenolic compounds and is generally considered as waste. This study aimed to maximise recovery of phenolics from banana peel using water via microwave assisted extraction. The impact of various parameters including pH of solvent, sample to solvent ratio, irradiation time with/without cooling periods, and irradiation power were investigated individually. Following this, extraction conditions were further optimised using Response Surface Methodology. The results revealed that the extraction efficiency can be significantly improved by reducing the pH of water, increasing microwave power and time. However, cooling time during irradiation did not affect the extraction efficiency. Optimal conditions were identified at pH of 1, ratio of 2:100 g/mL, 6 min irradiation, and microwave power of 960 W. Under these optimal conditions, approximately 50.55 mg phenolics could be recovered from 1 g dried peel. These conditions are recommended for recovery of phenolic compounds from banana peel for further utilisation.
香蕉皮富含酚类化合物，通常被视为废弃物。本研究旨在通过微波辅助水提取法，最大限度地从香蕉皮中回收酚类物质。分别考察了包括溶剂pH值、样品与溶剂比例、有无冷却期的辐照时间以及辐照功率等各种参数的影响。在此基础上，采用响应面法进一步优化提取条件。结果表明，降低水的pH值、提高微波功率和时间可显著提高提取效率。然而，辐照过程中的冷却时间对提取效率没有影响。确定的最佳条件为pH值1、比例2:100 g/mL、辐照6分钟以及微波功率960 W。在这些最佳条件下，每1克干皮可回收约50.55毫克酚类物质。推荐这些条件用于从香蕉皮中回收酚类化合物以供进一步利用。
