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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 63, Number 2
JKCSEZ 63(2)
April 20, 2019 

High-resolution 1H NMR Spectroscopy of Green and Black Teas
Ji Ho Jeong, Hyun Jun Jang, Yongae Kim*
Multivariate analysis, 1H NMR, Green tea, Black tea, Classification
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.
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