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Metabolite profiling using (1)H NMR spectroscopy for quality assessment of green tea, Camellia sinensis (L.).
J Agric Food Chem. 2004 Feb 25; 52(4):692-700.JA

Abstract

A set of 191 green teas from different countries was collected and analyzed by (1)H NMR. It was proposed to establish if the teas could be discriminated according to the country of origin or with respect to quality. Both principal component analysis (PCA) and cluster analysis were applied to the data. Some separation of Chinese and non-Chinese teas was observed. The present results did not allow allocation of samples to individual countries, but cluster analysis suggested that it might be possible with an augmented sample set. The PCA did show a separation between the Longjing type (highest quality Chinese tea) and most other Chinese teas and indicated some metabolites that could be responsible for the difference. Longjing teas showed higher levels of theanine, gallic acid, caffeine, epigallocatechin gallate, and epicatechin gallate and lower levels of epigallocatechin when compared with other teas. These compounds have been mentioned previously in connection with quality, but it was also shown that higher levels of theogallin (5-galloyl quinic acid), theobromine, 2-O-(beta-l-arabinopyranosyl)-myo-inositol and some minor sugar-containing compounds were found in Longjing teas while higher levels of fatty acids and sucrose were found in the other teas. These new markers could prove to be useful for the authentication of bulk tea.

Authors+Show Affiliations

Institute of Food Research, Norwich Research Park, Colney, Norwich NR4 7UA, United Kingdom. gwenaelle.legall@bbsrc.ac.ukNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

14969518

Citation

Le Gall, Gwénaëlle, et al. "Metabolite Profiling Using (1)H NMR Spectroscopy for Quality Assessment of Green Tea, Camellia Sinensis (L.)." Journal of Agricultural and Food Chemistry, vol. 52, no. 4, 2004, pp. 692-700.
Le Gall G, Colquhoun IJ, Defernez M. Metabolite profiling using (1)H NMR spectroscopy for quality assessment of green tea, Camellia sinensis (L.). J Agric Food Chem. 2004;52(4):692-700.
Le Gall, G., Colquhoun, I. J., & Defernez, M. (2004). Metabolite profiling using (1)H NMR spectroscopy for quality assessment of green tea, Camellia sinensis (L.). Journal of Agricultural and Food Chemistry, 52(4), 692-700.
Le Gall G, Colquhoun IJ, Defernez M. Metabolite Profiling Using (1)H NMR Spectroscopy for Quality Assessment of Green Tea, Camellia Sinensis (L.). J Agric Food Chem. 2004 Feb 25;52(4):692-700. PubMed PMID: 14969518.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Metabolite profiling using (1)H NMR spectroscopy for quality assessment of green tea, Camellia sinensis (L.). AU - Le Gall,Gwénaëlle, AU - Colquhoun,Ian J, AU - Defernez,Marianne, PY - 2004/2/19/pubmed PY - 2004/4/7/medline PY - 2004/2/19/entrez SP - 692 EP - 700 JF - Journal of agricultural and food chemistry JO - J Agric Food Chem VL - 52 IS - 4 N2 - A set of 191 green teas from different countries was collected and analyzed by (1)H NMR. It was proposed to establish if the teas could be discriminated according to the country of origin or with respect to quality. Both principal component analysis (PCA) and cluster analysis were applied to the data. Some separation of Chinese and non-Chinese teas was observed. The present results did not allow allocation of samples to individual countries, but cluster analysis suggested that it might be possible with an augmented sample set. The PCA did show a separation between the Longjing type (highest quality Chinese tea) and most other Chinese teas and indicated some metabolites that could be responsible for the difference. Longjing teas showed higher levels of theanine, gallic acid, caffeine, epigallocatechin gallate, and epicatechin gallate and lower levels of epigallocatechin when compared with other teas. These compounds have been mentioned previously in connection with quality, but it was also shown that higher levels of theogallin (5-galloyl quinic acid), theobromine, 2-O-(beta-l-arabinopyranosyl)-myo-inositol and some minor sugar-containing compounds were found in Longjing teas while higher levels of fatty acids and sucrose were found in the other teas. These new markers could prove to be useful for the authentication of bulk tea. SN - 0021-8561 UR - https://www.unboundmedicine.com/medline/citation/14969518/Metabolite_profiling_using__1_H_NMR_spectroscopy_for_quality_assessment_of_green_tea_Camellia_sinensis__L___ L2 - https://doi.org/10.1021/jf034828r DB - PRIME DP - Unbound Medicine ER -