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中国精品科技期刊2020
桂安辉,叶飞,王胜鹏,等. 扁形绿茶矿质元素含量与品质成分相关性分析[J]. 食品工业科技,2022,43(16):315−321. doi: 10.13386/j.issn1002-0306.2021110190.
引用本文: 桂安辉,叶飞,王胜鹏,等. 扁形绿茶矿质元素含量与品质成分相关性分析[J]. 食品工业科技,2022,43(16):315−321. doi: 10.13386/j.issn1002-0306.2021110190.
GUI Anhui, YE Fei, WANG Shengpeng, et al. Correlation Analysis between Mineral Elements Content and Quality Ingredients of Flat Green Tea[J]. Science and Technology of Food Industry, 2022, 43(16): 315−321. (in Chinese with English abstract). doi: 10.13386/j.issn1002-0306.2021110190.
Citation: GUI Anhui, YE Fei, WANG Shengpeng, et al. Correlation Analysis between Mineral Elements Content and Quality Ingredients of Flat Green Tea[J]. Science and Technology of Food Industry, 2022, 43(16): 315−321. (in Chinese with English abstract). doi: 10.13386/j.issn1002-0306.2021110190.

扁形绿茶矿质元素含量与品质成分相关性分析

Correlation Analysis between Mineral Elements Content and Quality Ingredients of Flat Green Tea

  • 摘要: 为探明扁形绿茶矿质元素含量与品质成分是否存在一定的相关性,实地采集5个产地(湖北省大悟县、浙江省磐安县、安徽省歙县、贵州省湄潭县、四川省峨眉山市)共10个代表性扁形绿茶样品,测定了9种矿质元素(Mg、K、Ca、P、Al、Mn、Fe、Zn、B)与5种品质成分(水浸出物、茶多酚、游离氨基酸、可溶性总糖、咖啡碱)含量。结果表明,扁形绿茶样品中矿质元素之间互相影响,存在协同或拮抗作用。品质成分中水浸出物含量与B含量呈显著负相关(P<0.05),茶多酚含量与Fe含量呈极显著负相关(P<0.01),可溶性总糖含量与B含量呈显著正相关(P<0.05),与Mg、Ca含量则呈显著负相关(P<0.05),Fe、Mn含量与咖啡碱存在显著负相关(P<0.05)。主成分分析结果显示前3个主成分解释累计方差贡献率为89.00%,Mg、Ca、Zn、Al、P可作为扁形绿茶的特征矿质元素,水浸出物、游离氨基酸可作为评价扁形绿茶品质的重要理化指标。聚类分析结果表明,同一产地的扁形绿茶样品聚为一类,不同产地则明显区分开,表明扁形绿茶品质存在明显的地域分布特征。

     

    Abstract: In order to explore the correlation between mineral elements content and quality ingredients of flat green tea, ten representative flat green tea samples from five production areas (Dawu County, Hubei Province, Pan'an County, Zhejiang Province, She County, Anhui Province, Meitan County, Guizhou Province and Emeishan City, Sichuan Province) were collected. The content of nine mineral elements (Mg, K, Ca, P, Al, Mn, Fe, Zn, B) and five quality ingredients (water extracts, tea polyphenols, free amino acids, total soluble sugars, caffeine) were determined. Results showed that the mineral elements influenced each other and existed with synergistic or antagonistic effects. The water extracts content was significantly negatively correlated with the B content (P<0.05), the tea polyphenol content was extremely negatively correlated with Fe content (P<0.01), the total soluble sugar content was significantly positive to the B content (P<0.05), but negatively correlated with Mg and Ca content (P<0.05), Fe and Mn had a negative effect on caffeine content. The principal component analysised exhibited that the first three principal components explained 89.00% of the cumulative variance contribution, Mg, Ca, Zn, Al and P were considered as characteristic elements of flat green tea, water extracts content and free amino acids content were considered as important physicochemical indicators to evaluate the quality of flat green tea. Cluster analysis showed that samples from the same producing area were grouped together, and samples from different producing areas were clearly separated, indicated that the quality of flat green tea showed distinct regional distribution characteristics.

     

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