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Position: Home > Articles > Effects of Drying Technique on Tuocha Quality Research of Agricultural Modernization 2004,25 (6) 474-477

干燥工艺技术对沱茶品质形成的影响

作  者:
徐仲溪;王坤波;高代珍;刘德华;简伯华
单  位:
湖南省怡清源茶叶有限公司;湖南农业大学食品科技学院;湖南农业大学工程技术学院;湖南省天然产物工程技术研究中心
关键词:
沱茶;干燥工艺;品质
摘  要:
通过不同干燥工艺技术处理和沱茶生化品质成分分析,探索了干燥工艺技术对沱茶品质形成的影响。结果表明,不同干燥温度对沱茶水分散失速度不同,不同重量规格的沱茶在同一温度条件下水分散失也不同。沱茶(100g)在40℃、60℃干燥,多酚类、咖啡碱、儿茶素总量、EGC、EGCG、GCG、ECG儿茶素组分物质含量及酚/氨比值比在80℃、100℃干燥均要低,但氨基酸总量在40℃、60℃干燥比80℃、100℃干燥要高;不同干燥温度对沱茶色泽物质的形成存在差异,低温干燥(40—60℃),有利于沱茶色泽物质由绿变黄转化;内质感官审评以40℃、60℃优于80℃、100℃的沱茶。故低温长时干燥则有利于沱茶滋味和色泽物质的形成与转化,从而形成沱茶特有的品质风味。
译  名:
Effects of Drying Technique on Tuocha Quality
作  者:
XU Zhongxi~1,WANG Kunbo~2,GAO Daizhen~3,LIU Dehua~1,JIAN Baihua~4 (1.College of Food Science and Technology, Hunan Agricultural University, Changsha410128,China; 2.Hunan Provincial Engineering Research Center for Natural Products, Changsha410128,China; 3.College of Engineering and Technology,Hunan Agricultural University,Changsha;410128,China; 4.Yiqingyuan Tea Cooperation Limited Company,Changsha410128,China)
关键词:
Tuocha;drying technique;quality
摘  要:
Different drying technique and the analysis on the chemical companents of Tuocha were carried out to investigate the effect of drying technique on of the quality.The result shows that dissipating velocity of water in Tuocha is different according to different drying temperature. To Tuocha of different weight, dissipating velocity of water is also diffenent at the same drying temperature. The content of tea polyphenol, total catechins, EGC、EGCG、GCG、ECG and phenol/animo value is smaller at drying tempeture 40℃,60℃ than at drying tempeture 80℃,100℃ , but the content of amino acid is bigger at drying tempeture 40℃,60℃. There exists a difference in the formation of Tuocha pigments between different temperature. Lower drying temperature 40-60℃ does good to the formation of Tuocha pigments. Organoleptic evaluation also shows that the quality of Tuocha is better at at drying tempeture 40℃,60℃ than at drying tempeture 80℃,100℃ . So lower drying temperature and long drying time is beneifical to the formation and transformation of pigments and colors of Tuocha.

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