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中国精品科技期刊2020
罗艳, 阮俊翔, 苏志恒, 林翠, 覃杨. FTIR结合主成分分析鉴别不同年份六堡茶[J]. 食品工业科技, 2014, (12): 55-57. DOI: 10.13386/j.issn1002-0306.2014.12.002
引用本文: 罗艳, 阮俊翔, 苏志恒, 林翠, 覃杨. FTIR结合主成分分析鉴别不同年份六堡茶[J]. 食品工业科技, 2014, (12): 55-57. DOI: 10.13386/j.issn1002-0306.2014.12.002
LUO Yan, RUAN Jun-xiang, SU Zhi-heng, LIN Cui, QIN Yang. Discrimination of liubao tea by FTIR and principal component analysis[J]. Science and Technology of Food Industry, 2014, (12): 55-57. DOI: 10.13386/j.issn1002-0306.2014.12.002
Citation: LUO Yan, RUAN Jun-xiang, SU Zhi-heng, LIN Cui, QIN Yang. Discrimination of liubao tea by FTIR and principal component analysis[J]. Science and Technology of Food Industry, 2014, (12): 55-57. DOI: 10.13386/j.issn1002-0306.2014.12.002

FTIR结合主成分分析鉴别不同年份六堡茶

Discrimination of liubao tea by FTIR and principal component analysis

  • 摘要: 采用傅里叶变换红外光谱(FTIR)法结合主成分分析鉴别不同储存年份的六堡茶,并找出其化学组分差异,为鉴别不同储存年份六堡茶提供快速无损的方法。通过采集5个不同年份六堡茶的红外光谱,利用一阶导数重构红外图谱,建立主成分分析鉴别模型,并提取出模型的载荷因子。结果表明:样本在主成分空间中区分为不同的类别,基本实现不同年份六堡茶的鉴别。载荷因子分析显示,5个年份六堡茶化学组成的差异主要体现在茶多酚、咖啡碱及氨基酸3类物质成分含量的不同。本法可以快速、无损地鉴别不同年份的六堡茶,并且能反映不同年份六堡茶主要成分组成的差异。 

     

    Abstract: To discriminate liubao tea from different storage years, explore the difference of chemical components and establish a rapid and non-destructive method for the discrimination of liubao tea from different storage years, fourier transform infrared spectroscopy (FTIR) combined with principal component analysis was utilized in this study. Liubao tea samples from five different storage years were collected for FTIR analysis, the raw infrared spectra of the samples were processed by the first derivative, the data was used to establish a discriminated model by means of principal component analysis, and the loading factors were extracted from the established model. As a result, discrimination of liubao tea from different storage years was observed in score plots. In the loading plot, it demonstrated that chemical discrimination of liubao tea from five different storage years was correlated to the contents of polyphenols, caffeine and amino acid. This study indicated that discrimination of liubao tea from five different years was achieved rapidly and non-destructively, and difference of chemical composition in different years could be characterized by the strategy of FTIR analysis combined with principal component analysis.

     

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