Stability of microemulsions containing red grape pomace extract obtained with a glycerol/sodium benzoate deep eutectic solvent

OCL Pub Date : 2022-01-01 DOI:10.1051/ocl/2022023

A. Alibade, O. Kaltsa, Eleni Bozinou, V. Athanasiadis, D. Palaiogiannis, S. Lalas, A. Chatzilazarou, D. Makris

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引用次数: 3

Abstract

The valorization of red grape pomace is significant as grape is one of the most cultivated fruits worldwide and generated by-product quantities are enormous. For this purpose, numerous encapsulation techniques have been developed. However, the studies on microemulsions composed with deep eutectic solvent extracts are very limited. In this study, red grape pomace extract (RGPE) was first prepared by deep eutectic solvent extraction and characterized by HPLC analysis. Rutin, quercetin, catechin and caftaric acid were identified as the main non-pigment phenolic compounds. The RGPE was further encapsulated in microemulsions (MEs) following a low-energy approach using a mixture of low molecular weight surfactants, and the pseudo-ternary phase diagram was constructed. The physical and antioxidant stability of MEs containing 3–15 wt% RGPE was investigated for a period of 30 days. MEs were stable at an ambient temperature of 25 or 37 °C. The radical scavenging activity of encapsulated RGPE was improved up to 13% compared to the free extract. Our results indicate that microemulsions provide protection of valuable phenolic constituents especially under elevated temperature conditions and can therefore be used as systems for applications in nutraceuticals or cosmetics.

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用甘油/苯甲酸钠深共熔溶剂制备红葡萄渣提取物微乳的稳定性

红葡萄渣的增值意义重大，因为葡萄是世界上种植最多的水果之一，产生的副产品数量巨大。为此，开发了许多封装技术。然而，对深共晶溶剂萃取物组成的微乳的研究非常有限。本研究首次采用深度共晶溶剂萃取法制备了红葡萄渣提取物(RGPE)，并采用高效液相色谱法对其进行了表征。非色素类酚类化合物主要为芦丁、槲皮素、儿茶素和果酸。采用低分子量表面活性剂的混合物，采用低能方法将RGPE进一步封装在微乳液中，并构建了伪三元相图。研究了含有3-15 wt% RGPE的MEs的物理和抗氧化稳定性，为期30天。MEs在25℃或37℃的环境温度下都是稳定的。与游离提取物相比，包封RGPE的自由基清除活性提高了13%。我们的研究结果表明，微乳液可以保护有价值的酚类成分，特别是在高温条件下，因此可以用作营养品或化妆品的应用系统。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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OCL

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