Optimization of subcritical water extraction of flavanols from green tea leaves

Journal of Agricultural and Food Chemistry

Volumn 62, Issue 28, 2014, Pages 6828-6833

  Ko, Min Jung ^a   Cheigh, Chan Ick ^b   Chung, Myong Soo ^a  

^a Ewha Womans University   (South Korea)

^b Kyungpook National University   (South Korea)

Author keywords

epimerization; flavanols; green tea leaves; subcritical water extraction

Indexed keywords

FLAVONOIDS; ORGANIC COMPOUNDS; ORGANIC SOLVENTS; PHENOLS;

CONVENTIONAL EXTRACTION; EPIMERIZATION; EXTRACTION CONDITIONS; EXTRACTION EFFICIENCIES; EXTRACTION TEMPERATURES; FLAVANOLS; GREEN TEA; SUBCRITICAL WATER EXTRACTION;

EXTRACTION;

ANTIOXIDANT; CATECHIN; FLAVONOID; SOLVENT; TISSUE EXTRACT; WATER;

CAMELLIA SINENSIS; CHEMISTRY; COMPARATIVE STUDY; HIGH PERFORMANCE LIQUID CHROMATOGRAPHY; ISOLATION AND PURIFICATION; PLANT LEAF; PROCEDURES; SOLUBILITY;

ANTIOXIDANTS; CAMELLIA SINENSIS; CATECHIN; CHROMATOGRAPHY, HIGH PRESSURE LIQUID; FLAVONOIDS; PLANT LEAVES; SOLUBILITY; SOLVENTS; TISSUE EXTRACTS; WATER;

EID: 84904438977     PISSN: 00218561     EISSN: 15205118     Source Type: Journal    
DOI: 10.1021/jf5012006     Document Type: Article

References (24)

1. Fujiki, H. Two stages of cancer prevention with green tea J. Cancer Res. Clin. 1999, 125, 589-597
2. Higdon, J.; Frei, B. Tea catechins and polyphenols: health effects, metabolism, and antioxidant functions Crit. Rev. Food Sci. 2003, 43, 89-143
3. Anderson, O.; Markham, K. Chapter 4. Flavonoids in foods. Flavonoids (Chemistry, Biochemistry, and Applications); CRC Press/Taylor and Francis Group: Boca Raton, FL, USA, 2006.
4. Wang, R.; Zhou, W.; Jiang, X. Reaction kinetics of degradation and epimerization of epigallocatechin gallate in aqueous system over a wide temperature range J. Agric. Food Chem. 2008, 56, 2694-2701
5. Yoshida, Y.; Kiso, M.; Goto, T. Efficiency of the extraction of catechins from green tea Food Chem. 1999, 67, 429-433
6. Chang, C.; Chiu, K.; Chen, Y.; Chang, C. Separation of catechins from green tea using carbon dioxide extraction Food Chem. 2000, 68, 109-113
7. Naczk, M.; Shahidi, F. Review: Extraction and analysis of phenolics in food J. Chromatogr., A 2004, 1054, 95-111
8. Hu, J.; Zhou, D.; Chen, Y. Preparation and antioxidant activity of green tea extract enriched in epigallocatechin and epigallocatechin gallate J. Agric. Food Chem. 2009, 57, 1349-1353
9. Carr, A.; Mammucari, R.; Foster, N. A review of subcritical water as a solvent and its utilisation for the processing of hydrophobic organic compounds Chem. Eng. J. 2011, 172, 1-17
10. Ko, M.; Cheigh, C.; Cho, S.; Chung, M. Subcritical water extraction of flavonol quercetin from onion skin J. Food Eng. 2011, 102, 327-333
11. Cheigh, C.; Chung, E.; Chung, M. Enhanced extraction of flavanones hesperidin and narirutin from Citrus unshiu peel using subcritical water J. Food Eng. 2012, 110, 472-477
12. Ko, M.; Cheigh, C.; Chung, M. Relationship analysis between flavonoids structure and subcritical water extraction Food Chem. 2014, 143, 147-155
13. Choung, M.; Lee, M. Optimal HPLC condition for simultaneous determination of catechins and caffeine in green tea extracts Korean J. Crop Sci. 2008, 53, 224-232
14. Yang, Y.; Hildebrand, F. Phenanthrene degradation in subcritical water Anal. Chim. Acta 2006, 555, 364-369
15. Vuong, Q.; Golding, J.; Nguyen, M.; Roach, P. Extraction and isolation of catechins from tea J. Sep. Sci. 2010, 33, 3415-3428
16. Seto, R.; Nakamura, H.; Nanjo, F.; Hara, Y. Preparation of epimers of tea catechins by heat treatment Biosci., Biotechnol., Biochem. 1997, 61, 1434-1439
17. Suzuki, M.; Sano, M.; Yoshida, R.; Degawa, M.; Miyase, T.; Maeda-Yamamoto, M. Epimerization of tea catechins and O-methylated derivatives of (-)-epigallocatechin-3- O -gallate: relationship between epimerization and chemical structure J. Agric. Food Chem. 2003, 51, 510-514
18. Liang, H.; Liang, Y.; Dong, J.; Lu, J. Tea extraction methods in relation to control of epimerization of tea catechins J. Sci. Food Agric. 2007, 87, 1748-1752
19. Wang, H.; Helliwell, K. Epimerisation of green tea infusions Food Chem. 2000, 70, 337-344
20. Zhu, Q.; Zhang, A.; Tsang, D.; Huang, Y.; Chen, Z. Stability of green tea catechins J. Agric. Food Chem. 1997, 45, 4624-4628
21. Labbé, D.; Têtu, B.; Trudel, D.; Bazinet, L. Catechin stability of EGC- and EGCG-enriched tea drinks produced by a two-step extraction procedure Food Chem. 2008, 111, 139-143
22. Curren, M.; King, J. Solubility of triazine pesticides in pure and modified subcritical water Anal. Chem. 2001, 73, 740-745
23. Kang, J.; Chung, S.; Row, K. Comparison of experimental and calculated solubilities of (+)-catechin in green tea J. Ind. Eng. Chem. 2002, 8, 354-358
24. Pineiro, Z.; Palma, M.; Barroso, C. Determination of catechins by means of extraction with pressurized liquids J. Chromatogr., A 2004, 1026, 19-23