Mierczynska-Vasilev Agnieszka, Qi Geridi, Smith Paul, Bindon Keren, Vasilev Krasimir
The Australian Wine Research Institute, Waite Precinct, Hartley Grove Cnr Paratoo Road, Urrbrae (Adelaide) SA 5064, PO Box 197, Australia.
Future Industries Institute, University of South Australia, Mawson Lakes Campus, Mawson Lakes 5095, Australia.
Foods. 2019 Dec 18;9(1):1. doi: 10.3390/foods9010001.
Protein haze remains a serious problem for the wine industry and requires costly bentonite treatment, leading to significant wine volume loss. Recently developed magnetic separation technology that allows a fast and efficient separation of haze proteins from wine shows promise for the development of an alternative method for white wine fining. The key purpose of this study was to understand the potential of the nanoparticles to be reused in multiple fining and regeneration cycles. Bare and acrylic-acid-based plasma polymer coated magnetic nanoparticles were cleaned with water, 10% SDS/water and acetone/water solution after each adsorption cycle to investigate their restored efficiency in removing pathogenesis-related proteins from three unfined white wines. The concentrations of metals, acids and phenolics were monitored to determine changes in the concentration of these essential wine constituents. The regeneration study verified that the acrylic acid plasma-coated magnetic nanoparticles, which underwent ten successive adsorption-desorption processes, still retained close to the original removal capacity for haze proteins from wines when 10% SDS solution and water were used for surface regeneration. In addition, the concentrations of organic acids and wine phenolic content remained almost unchanged, which are important indicators for the retention of the original wine composition.
蛋白质浑浊仍然是葡萄酒行业面临的一个严重问题，需要进行成本高昂的膨润土处理，这会导致葡萄酒大量损失。最近开发的磁分离技术能够快速有效地从葡萄酒中分离出浑浊蛋白，为白葡萄酒澄清替代方法的开发带来了希望。本研究的关键目的是了解纳米颗粒在多个澄清和再生循环中重复使用的潜力。在每个吸附循环后，用水、10%十二烷基硫酸钠/水溶液和丙酮/水溶液清洗裸露的和丙烯酸基等离子体聚合物包覆的磁性纳米颗粒，以研究它们从三种未澄清白葡萄酒中去除病程相关蛋白的恢复效率。监测金属、酸和酚类物质的浓度，以确定这些葡萄酒基本成分浓度的变化。再生研究证实，当使用10%十二烷基硫酸钠溶液和水进行表面再生时，经过十次连续吸附-解吸过程的丙烯酸等离子体包覆磁性纳米颗粒，对葡萄酒中浑浊蛋白的去除能力仍接近原始水平。此外，有机酸浓度和葡萄酒酚类含量几乎保持不变，这是保留原始葡萄酒成分的重要指标。
Zotero 插件
