CAJ | 학술논문

对来自西湖龙井一级保护区、西湖龙井二级保护区、钱塘产区、越州产区4个产区的527份龙井茶样品进行了高效液相色谱测定和主成分分析及线性判别，结果表明：不同产区的龙井茶在儿茶素等酚性物质及咖啡碱含量上没有显著性差异；通过主成分分析，提炼出5个主成分，其中第一主成分构成中影响较大的因子有EGCG、EGC、C、CAF 和 EC，第二主成分构成中影响最大的因子为 ECG；在第一第二主成分得分值平面中，样品点基本按照品种聚合成群，说明原料品种不同是影响龙井茶的内含成分的主要因素之一；欧氏距离与判别分析结果显示，二级保护区的西湖龙井茶与一级保护区西湖龙井茶之间的差异最大，越州龙井与一级保护区西湖龙井茶产品间差异较小。
대래자서호룡정일급보호구、서호룡정이급보호구、전당산구、월주산구4개산구적527빈룡정다양품진행료고효액상색보측정화주성분분석급선성판별，결과표명：불동산구적룡정다재인다소등분성물질급가배감함량상몰유현저성차이；통과주성분분석，제련출5개주성분，기중제일주성분구성중영향교대적인자유EGCG、EGC、C、CAF 화 EC，제이주성분구성중영향최대적인자위 ECG；재제일제이주성분득분치평면중，양품점기본안조품충취합성군，설명원료품충불동시영향룡정다적내함성분적주요인소지일；구씨거리여판별분석결과현시，이급보호구적서호룡정다여일급보호구서호룡정다지간적차이최대，월주룡정여일급보호구서호룡정다산품간차이교소。
In present study, totally 527 Longjing tea samples were collected from four production areas and analyzed by high performance liquid chromatography (HPLC), combined with principal component analysis(PCA) and linear discriminant analysis(LDA). The result showed that 5 PCs could be extracted and the most important factors in the first PC composition were EGCG, EGC, C, CAF and EC. Meanwhile, the most important factor in the second PC was ECG. And in the score plot of the first two PCs, samples grouped according to the varieties of their fresh leaf material. On the other hand, the result of discriminant and Euclidean distance analysis suggested that the tea samples of Xihu Longjing secondary protection zone had the least similarity to those of primary protection zone. And compared to other two groups, the difference between Yuezhou Longjing and Xihu Longjing primary protection zone was the least.