黑枣油醋汁理化成分、挥发性成分及抗氧化活性分析

Analysis of Physicochemical Components,Volatile Components and Antioxidant Activity of Black Jujube Vinaigrette

在普通油醋汁的基础上开发出了一款新型黑枣油醋汁产品,通过实验对比分析,得出黑枣油醋汁与普通油醋汁在成分与功能上有着显著差异。该实验比较了黑枣油醋汁与普通油醋汁中多酚、黄酮、总酸、蛋白质、氨基酸态氮、挥发性成分的含量,同时比较了黑枣油醋汁与普通油醋汁的抗氧化活性。结果表明,黑枣油醋汁中多酚含量较普通油醋汁提高了47.2%;黄酮和蛋白质含量增加不明显,比普通油醋汁分别提高了8.57%、4.18%;黑枣油醋汁中总酸、氨基酸态氮含量比普通油醋汁分别降低了32.4%、20.3%;黑枣油醋汁挥发性成分的种类比普通油醋汁少5种,且主要的呈味物质发生改变;黑枣油醋汁清除DPPH、ABTS自由基及FRAP的IC_(50)值均低于普通油醋汁,分别为0.26,0.091,0.097 mg/mL,可以看出黑枣油醋汁的抗氧化活性高于普通油醋汁。文章通过比较分析实验结果,充分证明了黑枣油醋汁的优越性。

A new type of black jujube vinaigrette product is developed on the basis of ordinary vinaigrette.Through comparative analysis of experiments,it is concluded that there are significant differences in the composition and function between black jujube vinaigrette and ordinary vinaigrette.In this experiment,the content of polyphenols,flavonoids,total acids,proteins,amino acid nitrogen and volatile components in black jujube vinaigrette and ordinary vinaigrette are compared,and the antioxidant activity of black jujube vinaigrette and ordinary vinaigrette are compared.The results show that the content of polyphenols in black jujube vinaigrette is 47.2%higher than that in ordinary vinaigrette.The increase of flavonoid and protein content is not obvious,which is 8.57%and 4.18%higher than that in ordinary vinaigrette.The content of total acids and amino acid nitrogen in black jujube vinaigrette is 32.4%and 20.3%lower than that in ordinary vinaigrette.The types of volatile components in black jujube vinaigrette are five less than those in ordinary vinaigrette,and the main flavor substances change.The IC_(50) values of scavenging DPPH,ABTS free radicals and FRAP of black jujube vinaigrette are all lower than those of ordinary vinaigrette,which are 0.26,0.091,0.097 mg/mL respectively,indicating that the antioxidant activity of black jujube vinaigrette is better than that of ordinary vinaigrette.In this paper,the superiority of black jujube vinaigrette is fully proved by comparing and analyzing the experimental results.