| 基于HPLC和模式识别的绿茶分类 |
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| 引用本文： | 赵杰文,郭志明,陈全胜.基于HPLC和模式识别的绿茶分类[J].江苏大学学报(自然科学版),2010,31(3). |
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| 作者姓名： | 赵杰文 郭志明 陈全胜 |
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| 作者单位： | 江苏大学,食品与生物工程学院,江苏,镇江,212013 |
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| 基金项目： | 国家自然科学基金资助项目(30971685) |
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| 摘 要： | 为判别不同绿茶的类别,利用高效液相色谱分析茶叶中儿茶素和咖啡因等内部有效成分的质量分数,根据其质量分数利用模式识别方法进行分类.试验以5种中国绿茶为研究对象,首先,采用高效液相法分析茶叶中表没食子儿茶素、(+)-儿茶素、表儿茶素、表没食子儿茶素没食子酸酯、表儿茶素没食子酸酯和咖啡因等6种有效成分的质量分数.在此基础上,分别运用线性判别分析(LDA)、K最邻近(KNN)和人工神经网络(ANN)等模式识别方法建立相关模型对5种绿茶进行判别分析,试验结果表明ANN判别模型效果最好,模型训练和预测时的判别率分别达到98%和92%.研究结果表明,利用HPLC分析茶叶中的儿茶素和咖啡因等质量分数,再结合ANN模式识别的方法可以对不同类别的绿茶进行定性判别.
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| 关 键 词： | 绿茶 HPLC 模式识别 分类 儿茶素 咖啡因 |
Identification of green teas by HPLC and pattern recognition |
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| Zhao Jiewen,Guo Zhiming,Chen Quansheng.Identification of green teas by HPLC and pattern recognition[J].Journal of Jiangsu University:Natural Science Edition,2010,31(3). |
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| Authors: | Zhao Jiewen Guo Zhiming Chen Quansheng |
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| Affiliation: | School of Food and Biological Engineering/a>;Jiangsu University/a>;Zhenjiang/a>;Jiangsu 212013/a>;China |
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| Abstract: | Identification of green teas was made according to catechins and caffeine contents.Five varieties of green teas were tested in the experiment.First,the contents of catechins(epigallocatechin,epicatechincatechin,epigallocatechin gallate,epicatechin gallate) and caffeine were determined by HPLC.Then,Linear Discriminant Analysis(LDA),K-Nearest Neighbors(KNN),and Back-Propagation Artificial Neural Networks(BP-ANN) were applied comparatively to identify tea varieties as pattern recognition method.Experimental re... |
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| Keywords: | green tea HPLC pattern recognition identification catechins caffeine |
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