Abstract：
The clarification conditions and the selection of the clarification agent are pivotal in eliminating the haze components from red grape juice (RGJ) while minimizing the loss of functional color components. In this context, we synthesized a water glass-based APTES functionalized magnesium silica aerogel (MSA-NH3) incorporating 61.44 molecules/nm2 of amine groups, resulting in a positively charged zeta potential value of 33.9 mV (pH 3.4) for clarification of RGJ by targeting negatively charged polyphenols. The optimum clarification conditions using MSA-NH3 were determined as 0.18 g MSA-NH3/L RGJ, 20 °C, and 60 min through the application of Box-Behnken design. Under these conditions, MSA-NH3 exhibited excellent adsorption of haze components (3.61 NTU), outperforming the commercial bentonite-gelatine combination (BGC) (5.45 NTU). Furthermore, it exhibited greater efficacy in preserving anthocyanins while adsorbing browning components. MSA-NH3 has a high potential to serve as a functional alternative clarification agent in the beverage industry due to its promising clarification performance.
摘要：
澄清条件和澄清剂的选择对于消除红葡萄汁（RGJ）中的混浊成分同时最大程度地减少功能性颜色成分的损失至关重要。在这种情况下，我们合成了一种基于水玻璃的APTES官能化的镁二氧化硅气凝胶（MSA-NH3），其中包含61.44分子/nm2的胺基，导致带正电荷的zeta电位值为33.9mV（pH3.4），用于通过靶向带负电荷的多酚来澄清RGJ。使用MSA-NH3的最佳澄清条件确定为0.18gMSA-NH3/LRGJ，20°C,并通过Box-Behnken设计的应用60分钟。在这些条件下,MSA-NH3表现出优异的雾度组分吸附(3.61NTU),优于商业膨润土-明胶组合（BGC）（5.45NTU）。此外，在吸附褐变成分的同时，它在保存花色苷方面表现出更大的功效。由于MSA-NH3具有良好的澄清性能，因此在饮料工业中具有很高的功能替代澄清剂的潜力。
