Pre-incubation with 2 g/L chitosan followed by filtration had a better effect than adding 50 mg/L sulphurdioxide to the experimental Chardonnay wine on the release of 4-POBN adducts after 6 days of incubation with 100 μM iron(II). In a relevant photooxidative system acetaldehyde formation was significantly reduced after 6 days of incubation. Parallel EPR tests were performed to assess the importance
通过电子顺磁共振(EPR)研究了两种商业上不溶的壳聚糖(一种被批准用于酿酒)在模型酒和不含亚硫酸盐的白葡萄酒中对氧化降解的功效。两种化合物在不同剂量下均显着抑制α-(4-吡啶基-1-氧化物)-N - t的形成正常葡萄酒储存条件下的丁基丁基亚硝基(4-POBN)-1-羟乙基加合物。与100μM铁(II)孵育6天后,与2 g / L脱乙酰壳多糖进行预温育然后过滤比将50 mg / L二氧化硫添加到实验霞多丽酒中对4-POBN加合物的释放有更好的效果。在相关的光氧化系统中,孵育6天后乙醛的形成显着减少。进行了并行的EPR测试,以评估金属螯合(铁和铜)相对于直接清除羟基自由基对壳聚糖的影响的重要性。本数据支持使用生物相容性壳聚糖作为更健康的补充和/或替代二氧化硫对抗白葡萄酒氧化变质的潜力。