不同保鲜处理对名优绿茶品质的影响

Effect of Different Preservation Treatments on Quality of Famous Green Tea

[目的]研究名优绿茶在不同的保鲜贮藏条件下,主要相关生化成分随时间的变化规律,筛选出最佳的保鲜贮藏技术参数。[方法]采用6种不同的包装材料,在不同的贮藏温度、除氧和有氧条件下对名优绿茶进行保鲜处理试验。[结果]试验表明,低温贮藏有利于保持茶叶的感官品质。利乐包和铝箔包中茶样含水量分别为7.12%与7.31%;锡箔/聚乙烯袋(5℃)中茶样氨基酸含量降幅最小,为4.11%;利乐包中茶样的V C保持效果最好,降幅为45.70%;锡箔/聚乙烯袋除氧包装+铁罐包装中茶样的茶多酚、咖啡碱和儿茶素含量最高,分别仅下降2.65%、13.04%和14.92%,而硬纸筒中茶样的儿茶素降幅达26.41%;利乐包对名优绿茶具有良好的保鲜效果。

[ Objective] To study changing laws of related biological and chemical components of famous green tea in different preservation conditions, and figure out the optimal preservation technical parameters. [ Method ] Use 6 different packing materials, at different storage tem- peratures, oxygen and aerobic conditions for preservation test. [ Result] Low temperature storage can save the sensory quality of tea. Water content of tea samples in Tetra Pak and foil packets was 7.12% and 7.31% ; amino acid content in tea samples in foil / PE bag （5 ~C ） had the smallest reduction, 4.11% ; Vc content of tea samples in Tetra Pak is best preserved, reduces by 45.70% ; polyphenols, caffeine and cat- echins content in foil / PE bag deoxidation packaging and tin packaging of tea drop by 2.65%, 13.04% and 14.92% , respectively ; the car- ton catechin reduces by 26.41%. Packet Tetra Pak has good preservation effect on famous green tea.