包装方式对颗粒形绿茶贮藏品质和抗氧化活性的影响  

Effects of packaging methods on storage quality and antioxidant activity of granular green tea

作　　者：苏小琴[1,2] 左小博 黄伟红 陆德彪 孔俊豪 刁春华[1,2] 杨秀芳 SU Xiao-Qin;ZUO Xiao-Bo;HUANG Wei-Hong;LU De-Biao;KONG Jun-Hao;DIAO Chun-Hua;YANG Xiu-Fang(Hangzhou Tea Research Institute,All China Federation of Supply and Marketing Cooperatives,Hangzhou 310016,China;Zhejiang Key Laboratory of Transboundary Applied Technology for Tea Resource,Hangzhou 310016,China;Zhejiang Agricultural Technology Extension Center,Hangzhou 311103,China)

机构地区：[1]中华全国供销合作总社杭州茶叶研究所,杭州310016 [2]浙江省茶资源跨界应用技术重点实验室,杭州310016 [3]浙江省农业技术推广中心,杭州311103

出　　处：《食品安全质量检测学报》2023年第11期293-301,共9页Journal of Food Safety and Quality

基　　金：浙江省农业推广协同项目(2022XTTGCY03-04);浙江省“三农九方”科技协作计划项目(2022SNJF38)。

摘　　要：目的探索不同包装方式对颗粒形绿茶贮藏品质和抗氧化活性的影响。方法本研究将颗粒形绿茶分别采用单一铝箔包装和脱氧剂包装,在温度(15±1)℃、相对湿度65%下贮藏24个月,采用高效液相色谱法、感官审评方法和色差分析法,研究贮藏过程中风味成分和抗氧化活性的动态变化。结果与第0月比,两种包装方式颗粒形绿茶含水量整体呈上升趋势(P<0.05),单一铝箔包装颗粒形绿茶贮藏6个月咖啡碱含量显著下降(P<0.05),贮藏9个月非酯型儿茶素含量显著下降(P<0.05),贮藏12个月茶多酚、酯型儿茶素和儿茶素类总量显著下降(P<0.05)。而脱氧剂包装颗粒形绿茶贮藏12个月茶多酚、非酯型儿茶素、酯型儿茶素含量和儿茶素类总量无显著变化(P>0.05)。贮藏第24个月,单一铝箔和脱氧包装颗粒形绿茶茶汤L分别为93.88和94.49,a分别为-2.25和-2.43,b分别为14.14和13.75,1,1-二苯基-2-三硝基苯肼(1,1-diphenyl-2-picrylhydrazyl,DPPH)自由基清除率分别为48.96%和60.87%。相关性结果表明,不同包装方式颗粒形绿茶的DPPH自由基清除率与b/a、茶多酚、表儿茶素含量呈极显著正相关(P<0.01)。感官审评表明,采用脱氧包装的颗粒形绿茶的汤色、滋味和感官总分始终高于单一铝箔包装。结论相较于单一铝箔包装,采用脱氧包装更有利于保持颗粒形绿茶贮藏品质,从而延长颗粒形绿茶货架期。本研究为颗粒形绿茶贮藏品质控制提供了理论依据和技术指导。Objective To explore the effects of different packaging on quality and antioxidant activity of granular green tea during storage.Methods The granular green tea were packaged by single aluminum foil and de-oxygen,respectively,and stored at temperature of(15±1)℃and relative humidity of 65%for 24 months.Then the dynamic changes of flavor components and antioxidant activity were investigated by high performance liquid chromatography,sensory evaluation method and color difference analysis during storage.Results Compared to the 0th month,the moisture content of granular green tea in both packaging methods showed an overall upward trend.The caffeine content of granular green tea in a single aluminum foil packaging decreased significantly after 6 months of storage(P<0.05),the content of non-ester catechin decreased significantly after 9 months of storage(P<0.05),and the total amount of tea polyphenols,ester catechin and catechin decreased significantly after 12 months of storage(P<0.05).However,the content of tea polyphenols,non-ester catechin,ester catechin and total catechin of granular green tea packaged with oxygen scavenger did not change significantly after 12 months storage(P>0.05).At the 24th month of storage,the L of single aluminum foil and deoxygenated packaged granular green tea soup were 93.88 and 94.49,respectively,a was-2.25 and-2.43,b was 14.14 and 13.75,respectively.The free radical scavenging rates of 1,1-diphenyl-2-picrylhydrazyl(DPPH)were 48.96%and 60.87%,respectively.The correlation results showed that the DPPH free radical scavenging rate of granular green tea with different packaging methods was significantly positively correlated with the content of b/a,tea polyphenols,and epicatechin(P<0.01).Sensory evaluation showed that the soup color,taste,and total sensory scores of granular green tea packaged with deoxygenation were consistently higher than those of single aluminum foil packaging.Conclusion Compared to a single aluminum foil packaging,using deoxygenated packaging is more conducive to main

关 键 词：颗粒形绿茶 包装方式 贮藏品质 抗氧化活性 

分 类 号：TS272.51[农业科学—茶叶生产加工]