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首页> 外文期刊>International Journal of Waste Resources >Characterization of Polyphenolic Phytochemicals in Red Grape Pomace
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Characterization of Polyphenolic Phytochemicals in Red Grape Pomace

机译：红葡萄果渣中多酚植物化学物质的表征

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Polyphenolic phytochemicals are of particular importance to the food, pharmaceutical and cosmetics industry, because of their unique antioxidant properties. Red grape pomace is a solid waste of the wine manufacturing process and possesses a very high polyphenolic load, hence its significance as a rich and abundant residua source. However, in many instances there is a lack of analytical data regarding its polyphenolic composition. In this study, red grape pomace originating from the Greek native cultivar Vitis vinifera var. Agiorgitiko was efficiently extracted with 57% aqueous ethanol, which is a non-toxic and environmentally benign solvent, with the aim of obtaining a polyphenol-enriched extract. The extract was subsequently analyzed by liquid chromatography-diode array-mass spectrometry analysis, in order to tentatively characterize the major phytochemicals recovered. The compounds identified were a p-coumaric acid derivative, three flavonol conjugates (two glucosides and a glucuronide), along with three anthocyanin pigments that occur in grape berries. Three other major phenolics detected could not be assigned to a tentative formula and their structural elucidation merits further investigation. The data generated from this study could be used in assessing the overall polyphenolic profile of the pomace from this particular Greek, native variety, which could be of value in producing commercial formulations with high antioxidant activity.
机译：多酚植物化学物质由于其独特的抗氧化特性，对食品，制药和化妆品行业尤为重要。红葡萄果渣是葡萄酒生产过程中的固体废物，并具有很高的多酚负荷量，因此其作为丰富而丰富的残渣来源具有重要意义。但是，在许多情况下，缺乏有关其多酚组成的分析数据。在这项研究中，红葡萄果渣起源于希腊本土品种Vitis vinifera var。为了获得富含多酚的提取物，用57％的乙醇水溶液（无毒且对环境无害的溶剂）有效地提取了Agiorgitiko。随后通过液相色谱-二极管阵列质谱分析法对提取物进行分析，以初步鉴定回收的主要植物化学物质。鉴定出的化合物为对香豆酸衍生物，三种黄酮醇共轭物（两种葡糖苷和一种葡糖醛酸苷）以及葡萄浆果中的三种花色苷色素。检测到的其他三种主要酚类化合物不能分配给暂定式，其结构解析值得进一步研究。这项研究产生的数据可用于评估该特定希腊本土品种的果渣的多酚总体概况，这可能对生产具有高抗氧化活性的商业配方有价值。

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