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High-resolution 1H NMR Spectroscopy of Green and Black Teas

대한화학회지 2019년 63권 2호 p.78 ~ 84
 ( Jeong Ji-Ho ) - Hankuk University of Foreign Studies Department of Chemistry

장현준 ( Jang Hyun-Jun ) - Hankuk University of Foreign Studies Department of Chemistry
 ( Kim Yong-Ae ) - Hankuk University of Foreign Studies Department of Chemistry

Abstract


High-resolution 1H NMR spectroscopic technique has been widely used as one of the most powerful analytical tools in food chemistry as well as to define molecular structure. The 1H NMR spectra-based metabolomics has focused on classification and chemometric analysis of complex mixtures. The principal component analysis (PCA), an unsupervised clustering method and used to reduce the dimensionality of multivariate data, facilitates direct peak quantitation and pattern recognition. Using a combination of these techniques, the various green teas and black teas brewed were investigated via metabolite profiling. These teas were characterized based on the leaf size and country of cultivation, respectively.

키워드

Multivariate analysis; 1H NMR; Green tea; Black tea; Classification
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