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首页> 外文期刊>Journal of mass spectrometry: JMS >Changes in grape polyphenols (V-vinifera L.) as a consequence of post-harvest withering by high-resolution mass spectrometry: Raboso Piave versus Corvina
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Changes in grape polyphenols (V-vinifera L.) as a consequence of post-harvest withering by high-resolution mass spectrometry: Raboso Piave versus Corvina

机译：高分辨率质谱分析导致采后枯萎的葡萄多酚（V-vinifera L.）变化：Raboso Piave与Corvina

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摘要

Grape dehydration is an oenological process used for the production of high-quality reinforced and sweet wines. Corvina and Raboso Piave are two red grape varieties used for production of high-quality Italian wines, such as Recioto, Amarone di Valpolicella and Raboso Passito. Changes of polyphenolic composition of the grapes as a consequence of the withering were studied by ultra-high performance liquid chromatography-quadrupole time of flight mass spectrometry (UHPLC/QTOF); for identification of compounds a homemade HR-MS database of grape and wine metabolites, was used. Concomitant with trans-resveratrol and viniferins, relevant increases of other stilbenes (piceatannol, resveratrol trimers and tetramers) and antioxidant compounds (quercetin, syringetin and tamarixetin) were observed. These compounds are part of the induced metabolism occurring during the withering process and in general improve the nutraceutical properties of grapes and wines. On the other hand, longer processes showed to decrease flavan-3-ols and glycoside flavonols. Constant increase of E/Z epsilon-viniferin ratio was observed in all samples, and this parameter can be used to monitor the process. Copyright (c) 2016 John Wiley & Sons, Ltd.
机译：葡萄脱水是用于生产优质强化和甜葡萄酒的酿酒工艺。 Corvina和Raboso Piave是两个用于生产高品质意大利葡萄酒的红葡萄品种，例如Recioto，Amarone di Valpolicella和Raboso Passito。通过超高效液相色谱-四极杆飞行时间质谱（UHPLC / QTOF）研究了葡萄枯萎后葡萄多酚组成的变化;为了鉴定化合物，使用了葡萄和葡萄酒代谢产物的自制HR-MS数据库。与反式白藜芦醇和viniferins一起，观察到其他stilbenes（比卡萘酚，白藜芦醇三聚体和四聚体）和抗氧化剂化合物（槲皮素，pitteratin和tamarixetin）的相关增加。这些化合物是枯萎过程中诱导的新陈代谢的一部分，通常可改善葡萄和葡萄酒的营养保健特性。另一方面，较长的过程表明减少了黄烷-3-醇和糖苷黄酮醇。在所有样品中均观察到E / Zε-葡萄柚素比率不断增加，该参数可用于监控过程。版权所有（c）2016 John Wiley＆Sons，Ltd.

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