金苏英1，2，张丽华1，姚森1，2*，陈育红1，赵益臻1，王亮1，童彦1，欧凯1，2，李言郡1，2，金益英1，2，
（1 杭州娃哈哈集团有限公司，浙江杭州310018；
2浙江省食品生物工程重点实验室，浙江杭州310018）
摘要：以柠檬汁饮料为对象，研究维生素C降解的动力学、抗氧化剂对维生素C降解的影响，为其货架期稳定性的预测提供依据。结果显示，贮藏过程中维生素C和异抗坏血酸钠的降解均符合零级反应动力学或一级动力学模型，用一级动力学模型来描述维生素C的降解规律更合适。EDTA、异抗坏血酸钠和维生素E的添加对维生素C的降解速率和柠檬汁饮料产品的褐变有显著的影响；经添加0.02‰ EDTA、0.15‰异抗坏血酸钠和0.1‰维生素E，能有效地保护维生素C，减少维生素C在贮藏过程中的降解，同时能有效的延缓果汁的褐变。维生素C、异抗坏血酸钠和色差值的△E的变化速率k 均与贮藏温度有关，符合阿伦尼乌斯公式。在25℃～55℃范围，维生素C降解速率的Q10约为2.6～3.0，异抗坏血酸钠降解速率的Q10 约为2.5～2.8，色差△E变化的Q10 约为3.1～3.7，可以据此来预测产品在贮藏过程中的货架期稳定性。
关键词：维生素C；柠檬汁饮料；抗氧化剂；降解动力学；货架期稳定性
Study on Stability of Vitamin C in Lemon Juice BeverageJIN
Su-ying1，2，ZHANG Li-hua1，YAO Sen1，2*，CHEN Yu-hong1，ZHAO Yi-zhen1，WANG Liang1，TONG yan1，OU Kai1，2，LI Yan-Jun1，2，JIN Yi-ying1，2
（1 HangzhouWahaha Group Co.，Ltd.，Hangzhou 310018，China；
2 Key Laboratory of Food and Biological Engineering of Zhejiang Province，Hangzhou 310018，China）
Abstract: The kinetics of vitamin C degradation and the effects of antioxidants on vitamin C degradation in lemonjuice beverage were studied，which was used for the prediction of its shelf life stability. The results showed that thevitamin C and sodium isoascorbate degradation could be modeled by zero- order reaction kinetics or first- orderkinetics，and the latter was more suitable. EDTA，sodium isoascorbate and vitamin E had significantly affected thevitamin C degradation and the browning of lemon juice. Both the degradation of vitamin C and the browning oflemon juice beverage were significantly delayed during storage，when 0.02‰ EDTA，0.15‰ sodium isoascorbateand 0.1‰ vitamin E were added. During the storage of shelf life，the changes rate k of vitamin C，sodiumisoascorbate and color difference △E were all related to storage temperature，which conforms to Arrhenius formula.Between 25~55℃ ，the approximate Q10 value of Vitamin C degradation was 2.6～3.0，Q10 value of sodiumisoascorbate degradation was 2.5～2.8，and Q10 value of △E was 3.1～3.7. Therefore，the shelf life stability ofproducts could be predicted.
Key words: vitamin C；lemon juice beverage；antioxidant；degradation kinetics；shelf life stability
中图分类号：TS27 文献标志码：A 文章编号：1007-7871（2020）06-0006-06
（2020年 第23卷 第6期）