Quantitative and Qualitative Portrait of Green Tea Catechins (Gtc) Through Hplc

REFERENCES

• Cabrera, C.; Artacho, R.; Gimenez, R. Beneficial effects of green tea—A review. Journal of American College of Nutrition 2006, 25, 79–99.
   PubMed Web of Science ®Google Scholar
• Liang, Y.R.; Xu, Y.R. Effect of extraction temperature on cream and extractability of black tea (Camellia sinensis (L.) O. Kuntze). International Journal of Food Science and Technology 2003, 38, 37–45.
   Web of Science ®Google Scholar
• Lin, Y.S.; Tsai, Y.J.; Tsay, J.S.; Lin, J.K. Factors affecting the levels of tea polyphenols and caffeine in tea leaves. Journal of Agriculture and Food Chemistry 2003, 51, 1864–1873.
   PubMed Web of Science ®Google Scholar
• Bauer, V.; Sotnikova, R.; Machova, J.; Matyas, S.; Pucovsky, V.; Stefek, M. Reactive oxygen species induced smooth muscle responses in the intestine vessels and airways and the effect of antioxidants. Life Sciences 1999, 65, 1909–1917.
   PubMed Web of Science ®Google Scholar
• Khan, N.; Mukhtar, H. Tea polyphenols for health promotion. Life Sciences 2007, 81, 519–533.
   PubMed Web of Science ®Google Scholar
• Danrong, Z.; Yuqiong, C.; Dejiang, N. Effect of water quality on the nutritional components and antioxidant activity of green tea extracts. Food Chemistry 2009, 113, 110–114.
   Web of Science ®Google Scholar
• Liang, Y.R.; Yea, Q.J.; Liang, H.; Lu, J.L.; Du, Y.Y.; Dong, J.J. Chemical and instrumental assessment of green tea sensory preference. International Journal of Food Properties 2008, 11, 258–272.
   Web of Science ®Google Scholar
• AACC Approved Methods of the American Association of Cereal Chemists, 10th Ed; The American Association of Cereal Chemists: St Paul, MN, USA, 2000.
   Google Scholar
• Meterc, D.; Petermann, M.; Weidner, E. Drying of aqueous green tea extracts using a supercritical fluid spray process. The Journal of Supercritical Fluids 2008, 45, 253–259.
   Web of Science ®Google Scholar
• AOAC International. Official Methods of Analysis of Association of Official Analytical Chemists International. In: Horwitz, W.; Ed.; Association of Analytical Communities: Galthersburg, MD, USA, 17th Ed, Second revivion. 2003.
   Google Scholar
• Singleton, V.L.; Orthofer, R.; Lamuela-Raventos, R.M. Analysis of total phenols and other oxidation substrates and antioxidants by means of Folin-Ciocalteu reagent. Methods in Enzymology 1999, 299, 152–178.
   Web of Science ®Google Scholar
• Row, K.H.; Jin, Y. Recovery of catechin compounds from Korean tea by solvent extraction. Bioresource Technology 2006, 97, 790–793.
   PubMed Web of Science ®Google Scholar
• Liang, H.; Liang, Y.; Dong, J.; Lu, J. Tea extraction methods in relation to control of epimerization of tea catechins. Journal of Science of Food and Agriculture 2007, 87, 1748–1752.
   Web of Science ®Google Scholar
• Brand-Williams, W.; Cuvelier, M.E.; Berset, C. Useof a free radical method to evaluate antioxidant activity. Lebensmittel-Wissenschaft und-Technologie 1995, 28, 25–30.
   Web of Science ®Google Scholar
• Taga, M.S.; Miller, E.E.; Pratt, D.E. China seeds as source of natural lipid antioxidation. Journal of the American Oil Chemists’ Society 1984, 61, 928–931.
   Web of Science ®Google Scholar
• Steel, R.G.D.; Torrie, J.H.; Dickey, D. Principles and Procedures of Statistics: A Biometrical Approach, 3rd Ed; McGraw Hill Book Co Inc.: New York, 1997.
   Google Scholar
• Chee, D.C.; Juneja, L.R. Coeneral chemical composition of green tea and its infusion. In: Chemistry and Applications of Green Tea; Yamamoto, T.; Juneja, L.R.; Chee, D.C.; Kim, M.; Ed.; CRC Press: Japan, 1997.
   Google Scholar
• Asghar, Z.; Masood, Z. Evaluation of antioxidant properties of silymarin and its potential to inhibit peroxyl radicals in vitro. Pakistan Journal of Pharmaceutical Sciences 2008, 21 (3), 249–254.
   PubMed Web of Science ®Google Scholar
• Anesini, C.; Ferraro, G.E.; Filip, R. Total polyphenol content and antioxidant capacity of commercially available tea (Camellia sinensis) in Argentina. Journal of Agriculture and Food Chemistry 2008, 56 (19), 9225–9229.
   PubMed Web of Science ®Google Scholar
• Fernandez-Caceres, P.L.; Martın, M.J.; Pablos, F.; Gonzalez, A.G. Differentiation of tea (Camellia sinensis) varieties and their geographical origin according to their metal content. Journal of Agriculture and Food Chemistry 2001, 49, 4775–4779.
   PubMed Web of Science ®Google Scholar
• Wang, H.; Helliwell, K. Determination of flavonols in green and black tea leaves and green tea infusions by high-performance liquid chromatography. Food Research International 2001, 34, 223–227.
   Web of Science ®Google Scholar
• Rusak, G.; Komes, D.; Likic, S.; Horzic, D.; Kovac, M. Phenolic content and antioxidative capacity of green and white tea extracts depending on extraction conditions and solvent used. Food Chemistry 2008, 110, 852–858.
   PubMed Web of Science ®Google Scholar
• Druzynska, B.; Stepniewska, A.; Wolosiak, R. The influence of time and type of solvent on efficiency of the extraction of polyphenols from green tea and antioxidant properties obtained extracts. ACTA Scientiarum Polonorum Technologia Alimentaria 2007, 6 (1), 27–36.
   Google Scholar
• Friedman, M.; Levin, C.E.; Choi, S.H.; Kozukue, E.; Kozukue, N. HPLC analysis of catechins, theaflavins, and alkaloids in commercial teas and green tea dietary supplements: Comparison of water and 80% ethanol/water extracts. Journal of Food Science 2006, 71 (6), 328–337.
   Web of Science ®Google Scholar
• Nanjo, F.; Goto, K.; Seto, R.; Suzuki, M.; Sakai, M.; Hara, Y. Scavenging effects of tea catechins and their derivatives on l l-diphenyl-2-picrylhydrazyl radical. Free Radical Biology and Medicine 1996, 21 (6), 895–902.
   PubMed Web of Science ®Google Scholar