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Citation: LIN Xiao-Wen, XU Xuan, MA Zhong-Bin, LUO Yi-Fan, CHEN Hai-Qiang, PANG Shi. Optimizing Key Factors in Processing Lingtou Dancong Tea by Pattern Recognition Method[J]. Chinese Journal of Applied Chemistry, ;2006, 23(4): 459-461. shu

Optimizing Key Factors in Processing Lingtou Dancong Tea by Pattern Recognition Method

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a Department of Chemistry, South China Normal University, Guangzhou 510631;
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b Tea Research Institute, Gongdong Academy of Agricultural Sciences, Guangzhou

Corresponding author: LUO Yi-Fan,
Received Date: 25 May 2005
Available Online: 28 July 2005
Fund Project: 广东省科技计划项目(2003C20405) (2003C20405)农业部茶叶化学工程重点开放实验室开放课题(200401) (200401)

In the processing of Lingtou Dancong tea,27 factors were optimized by the pattern recognition method.From the 27 factors,5 major ones which affected tea quality were identified.These 5 factors were the time of sun-withering t₁,the number of green-making N,the first time for green-making Z₁,the laying time after last green-making t₁₀ and temperature for destroying enzyme t₁.The technic parameters of the 5 factors were that:t₁ was 10~45 min;N was 4~8;Z₁ was 5~20;t₁₀ was 60~120 min;t₁ was 120~200℃.The pattern recognition model on tea quality was built on the basis of the 5 factors.The quality of 17 tea samples was predicted by the pattern recognition model.The result shows that the prediction values of 17 tea samples were basically accordant with the experimental values.The 5 factors are key factors that affect tea quality and the quality of Lingtou Dancong tea can be improved by controlling the 5 key factors.
- lingtoudancong Oolong tea,
- pattern recognition,
- tea quality,
- processing factor
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