PMID: 11902920Mar 21, 2002Paper

Study of catechin and xanthine tea profiles as geographical tracers

Journal of Agricultural and Food Chemistry
Pedro L FernándezA G González

Abstract

The contents of gallic acid, epigallocatechin gallate, epigallocatechin, epicatechin, epicatechin gallate, catechin, caffeine, theophylline, and theobromine were determined in a set of 45 tea samples, including fermented (black and red) and nonfermented (green) teas of different geographical origins (i.e., China, Japan, Kenya, Sri Lanka, and India). A reversed-phase high performance liquid chromatographic method with gradient elution and photometric detection at 275 nm was used to carry out the analysis. Before the HPLC determination, an extraction step was developed using a mixture of acetonitrile and water (60:40, v/v). Pattern recognition techniques involving principal component analysis (PCA) and linear discriminant analysis (LDA) were applied to differentiate the tea samples according to their geographical origins. Catechins, gallic acid, and tea alkaloids are adequate chemical descriptors to distinguish between fermented and nonfermented tea samples cultivated in different geographical areas.

References

Oct 30, 1992·Journal of Chromatography·A FingerU H Engelhardt
May 1, 1984·Hypertension·J P Henry, P Stephens-Larson
Oct 16, 2001·Journal of Agricultural and Food Chemistry·P L Fernández-CáceresA G González

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Citations

Nov 27, 2007·Analytical and Bioanalytical Chemistry·J M JuradoA Navalón
Sep 12, 2003·Seizure : the Journal of the British Epilepsy Association·Kenneth R Kaufman, Rajesh C Sachdeo
Apr 4, 2006·Journal of the American College of Nutrition·Carmen CabreraRafael Giménez
Jun 16, 2012·Critical Reviews in Food Science and Nutrition·N S Ye
Feb 14, 2014·The Journal of Nutrition, Health & Aging·A Gramza-Michałowska
Oct 14, 2006·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Masako FujiwaraKazunori Arifuku
May 17, 2013·International Journal of Dermatology·Meng-I YehFeng-Lin Hsu
Aug 26, 2015·Food Chemistry·Paulo Henrique Gonçalves Dias DinizMário César Ugulino de Araújo
Sep 6, 2014·Frontiers in Microbiology·Wanda C Reygaert
Jul 29, 2009·Electrophoresis·Roberto GottiVanni Cavrini
Aug 16, 2019·Journal of the Science of Food and Agriculture·Shimao FangJingming Ning
May 20, 2016·Applied Biochemistry and Biotechnology·Manikandan MuthuSechul Chun
Sep 24, 2015·Journal of Food Science and Technology·Sena SaklarBulent Karadeniz
Oct 2, 2003·Journal of Agricultural and Food Chemistry·Steven MaranzNissim Garti
Feb 19, 2004·Journal of Agricultural and Food Chemistry·Gwénaëlle Le GallMarianne Defernez
Jul 10, 2003·Journal of Agricultural and Food Chemistry·Carmen CabreraM Carmen López
Sep 11, 2010·Journal of Agricultural and Food Chemistry·Jang-Eun LeeYoung-Shick Hong
Jan 5, 2006·Journal of Agricultural and Food Chemistry·Lucas Actis-GorettaCesar G Fraga

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