Quantification of Antioxidant Properties in Popular Leaf and Bottled Tea by High-performance Liquid Chromatography (HPLC), Spectrophotometry, and Voltammetry

References

• Abdali, D., S. E. Samson, and A. K. Grover. 2015. How effective are antioxidant supplements in obesity and diabetes? Medical Principles and Practice 24 (3):201–15. doi:10.1159/000375305
   PubMed Web of Science ®Google Scholar
• Anesini, C., G. E. Ferraro, and R. Filip. 2008. Total polyphenol content and antioxidant capacity of commercially available tea (Camellia sinensis) in Argentina. Journal of Agricultural and Food Chemistry 56 (19):9225–29. doi:10.1021/jf8022782
   PubMed Web of Science ®Google Scholar
• Box, J. D. 1984. Investigation of the Folin–Ciocalteu phenol reagent for the determination of polyphenolic substances in natural-waters. Water Research 18 (12):1599–1601. doi:10.1016/0043-1354(84)90136-2
   Web of Science ®Google Scholar
• Cabrera, C., R. Gimenez, and M. C. Lopez. 2003. Determination of tea components with antioxidant activity. Journal of Agricultural and Food Chemistry 51 (15):4427–35. doi:10.1021/jf0300801
   PubMed Web of Science ®Google Scholar
• Carloni, P., L. Tiano, L. Padella, T. Bacchetti, C. Customu, A. Kay, and E. Damiani. 2013. Antioxidant activity of white, green and black tea obtained from the same tea cultivar. Food Research International 53 (2):900–08. doi:10.1016/j.foodres.2012.07.057
   Web of Science ®Google Scholar
• Chandel, N. S., and D. A. Tuveson. 2014. The promise and perils of antioxidants for cancer patients. New England Journal of Medicine 371 (2):177–78. doi:10.1056/NEJMcibr1405701
   PubMed Web of Science ®Google Scholar
• Cheng, T. O. 2006. All teas are not created equal—The Chinese green tea and cardiovascular health. International Journal of Cardiology 108 (3):301–08. doi:10.1016/j.ijcard.2005.05.038
   PubMed Web of Science ®Google Scholar
• Denni, M., and D. Mammen. 2012. A critical evaluation on the reliability of two aluminum chloride chelation methods for quantification of flavonoids. Food Chemistry 135 (3):1365–68. doi:10.1016/j.foodchem.2012.05.109
   PubMed Web of Science ®Google Scholar
• Dias, T. R., M. G. Alves, G. D. Tomas, S. Socorro, B. M. Silva, and P. F. Oliveira. 2014. White tea as a promising antioxidant medium additive for sperm storage at room temperature: A comparative study with green tea. Journal of Agricultural and Food Chemistry 62 (3):608–17. doi:10.1021/jf4049462
   PubMed Web of Science ®Google Scholar
• Dudaric, L., A. Fuzinac-Smojver, D. Muhvic, and J. Giacometti. 2015. The role of polyphenols on bone metabolism in osteoporosis. Food Research International 77:290–98. doi:10.1016/j.foodres.2015.10.017
   Web of Science ®Google Scholar
• Ghosh, A., B. Tudu, P. Tamuly, N. Bhattacharyya, and R. Bandyopadhyay. 2012. Prediction of theaflavin and thearubigin content in black tea using a voltammetric electronic tongue. Chemometrics and Intelligent Laboratory Systems 116:57–66. doi:10.1016/j.chemolab.2012.04.010
   Web of Science ®Google Scholar
• Halliwell, B. 2007. Dietary polyphenols: Good, bad, or indifferent for your health? Cardiovascular Research 73 (2):341–47. doi:10.1016/j.cardiores.2006.10.004
   PubMed Web of Science ®Google Scholar
• Jayasekera, S., L. Kaur, A. L. Molan, M. L. Garg, and P. J. Moughan. 2014. Effects of season and plantation on phenolic content of unfermented and fermented Sri Lankan tea. Food Chemistry 152:546–51. doi:10.1016/j.foodchem.2013.12.005
   PubMed Web of Science ®Google Scholar
• Jurado-Coronel, J. C., M. Avila-Rodriguez, V. Echeverria, O. A. Hidalgo, J. Gonzalez, G. Aliev, and G. E. Barreto. 2016. Implication of green tea as a possible therapeutic approach for Parkinson disease. CNS & Neurological Disorders—Drug Targets 15 (3):292–300. doi:10.2174/1871527315666160202125519
   PubMed Web of Science ®Google Scholar
• Karori, S. M., F. N. Wachira, J. K. Wanyoko, and R. M. Ngure. 2007. Antioxidant capacity of different types of tea products. African Journal of Biotechnology 6 (19):2287–96.
   Google Scholar
• Khokhar, S., and S. G. M. Magnusdottir. 2002. Total phenol, catechin, and caffeine contents of teas commonly consumed in the United Kingdom. Journal of Agricultural and Food Chemistry 50 (3):565–70. doi:10.1021/jf010153l
   PubMed Web of Science ®Google Scholar
• Kilmartin, P. A., and C. F. Hsu. 2003. Characterisation of polyphenols in green, oolong, and black teas, and in coffee, using cyclic voltammetry. Food Chemistry 82 (4):501–12. doi:10.1016/s0308-8146(03)00066-9
   Web of Science ®Google Scholar
• Lee, B. L., and C. N. Ong. 2000. Comparative analysis of tea catechins and theaflavins by high performance liquid chromatography and capillary electrophoresis. Journal of Chromatography A 881 (1–2):439–47. doi:10.1016/s0021-9673(00)00215-6
   PubMed Web of Science ®Google Scholar
• Lee, L. S., S. H. Kim, Y. B. Kim, and Y. C. Kim. 2014. Quantitative analysis of major constituents in green tea with different plucking periods and their antioxidant activity. Molecules 19 (7):9173–86. doi:10.3390/molecules19079173
   PubMed Web of Science ®Google Scholar
• Leung, L. K., Y. L. Su, R. Y. Chen, Z. H. Zhang, Y. Huang, and Z. Y. Chen. 2001. Theaflavins in black tea and catechins in green tea are equally effective antioxidants. Journal of Nutrition 131 (9):2248–51.
   PubMed Web of Science ®Google Scholar
• Lin, S. D., P. Udompornmongkol, J. H. Yang, S. Y. Chen, and J. L. Mau. 2014. Quality and antioxidant property of three types of tea infusions. Journal of Food Processing and Preservation 38 (4):1401–08. doi:10.1111/jfpp.12099
   Web of Science ®Google Scholar
• Magalhaes, L. M., M. A. Segundo, S. Reis, J. L. F. C. Lima, I. V. Toth, and A. O. S. S. Rangel. 2007. Automatic flow system for sequential determination of ABTS+• scavenging capacity and Folin–Ciocalteu index: A comparative study in food products. Analytica Chimica Acta 592 (2):193–201. doi:10.1016/j.aca.2007.04.028
   PubMed Web of Science ®Google Scholar
• Nishimura, M., K. Ishiyama, A. Watanabe, S. Kawano, T. Miyase, and M. Sano. 2007. Determination of theaflavins including methylated theaflavins in black tea leaves by solid-phase extraction and HPLC analysis. Journal of Agricultural and Food Chemistry 55 (18):7252–57. doi:10.1021/jf070312m
   PubMed Web of Science ®Google Scholar
• Pekal, A., and K. Pyrzynska. 2014. Evaluation of aluminium complexation reaction for flavonoid content assay. Food Analytical Methods 7 (9):1776–82. doi:10.1007/s12161-014-9814-x
   Web of Science ®Google Scholar
• Pereira, C., L. Barros, M. Vilas-Boas, and I. C. F. R. Ferreira. 2013. Potentiating effects of honey on antioxidant properties of lemon-flavoured black tea. International Journal of Food Sciences and Nutrition 64 (2):230–34. doi:10.3109/09637486.2012.713916
   PubMed Web of Science ®Google Scholar
• Rana, A., and H. P. Singh. 2012. A rapid HPLC-DAD method for analysis of theaflavin using C-12 as stionary phase. Journal of Liquid Chromatography & Related Technologies 35 (16):2272–79.
   Web of Science ®Google Scholar
• Re, R., N. Pellegrini, A. Proteggente, A. Pannala, M. Yang, and C. Rice-Evans. 1999. Antioxidant activity applying an improved ABTS radical cation decolorization assay. Free Radical Biology and Medicine 26 (9–10):1231–37. doi:10.1016/s0891-5849(98)00315-3
   PubMed Web of Science ®Google Scholar
• Robertson, A., and M. N. Hall. 1989. A critical investigation into the Flavognost method for theaflavin analysis in black tea. Food Chemistry 34 (1):57–70. doi:10.1016/0308-8146(89)90033-2
   Web of Science ®Google Scholar
• Roginsky, V., T. Barsukova, C. F. Hsu, and P. A. Kilmartin. 2003. Chain-breaking antioxidant activity and cyclic voltammetry characterization of polyphenols in a range of green, oolong, and black teas. Journal of Agricultural and Food Chemistry 51 (19):5798–5802. doi:10.1021/jf030086q
   PubMed Web of Science ®Google Scholar
• Satoh, E., N. Tohyama, and M. Nishimura. 2005. Comparison of the antioxidant activity of roasted tea with green, oolong, and black teas. International Journal of Food Sciences and Nutrition 56 (8):551–59. doi:10.1080/09637480500398835
   PubMed Web of Science ®Google Scholar
• Seruga, M., I. Novak, and L. Jakobek. 2011. Determination of polyphenols content and antioxidant activity of some red wines by differential pulse voltammetry, HPLC and spectrophotometric methods. Food Chemistry 124 (3):1208–16. doi:10.1016/j.foodchem.2010.07.047
   Web of Science ®Google Scholar
• Sharma, V., H. V. Kumar, and L. J. M. Rao. 2008. Influence of milk and sugar on antioxidant potential of black tea. Food Research International 41 (2):124–29. doi:10.1016/j.foodres.2007.10.009
   Web of Science ®Google Scholar
• Singleton, V. L., R. Orthofer, and R. M. Lamuela-Raventos. 1999. Analysis of total phenols and other oxidation substrates and antioxidants by means of Folin–Ciocalteu reagent. In Oxidants and antioxidants, Pt A, ed. L. Packer, Academic Press, 152–78. The ISBN is 978-0-12-182200-2.
   Google Scholar
• Spiro, M., and W. E. Price. 1986. Determination of theaflavin in tea solution using the Flavognost complexation method. The Analyst 111 (3):331–33. doi:10.1039/an9861100331
   Web of Science ®Google Scholar
• Su, G. Y., and K. W. Wang. 2013. Methodological aspects to the determination of phenolic compounds in tea. Current Analytical Chemistry 9 (3):374–81. doi:10.2174/1573411011309030007
   Web of Science ®Google Scholar
• Tanaka, T., Y. Matsuo, and I. Kouno. 2010. Chemistry of secondary polyphenols produced during processing of tea and selected foods. International Journal of Molecular Sciences 11 (1):14–40. doi:10.3390/ijms11010014
   Web of Science ®Google Scholar
• Tufan, A. N., S. Baki, K. Guclu, M. Ozyurek, and R. Apak. 2014. A novel differential pulse voltammetric (DPV) method for measuring the antioxidant capacity of polyphenols-reducing cupric neocuproine complex. Journal of Agricultural and Food Chemistry 62 (29):7111–17. doi:10.1021/jf5017797
   PubMed Web of Science ®Google Scholar
• Zuo, Y. G., H. Chen, and Y. W. Deng. 2002. Simultaneous determination of catechins, caffeine and gallic acids in green, Oolong, black and pu-erh teas using HPLC with a photodiode array detector. Talanta 57 (2):307–16. doi:10.1016/s0039-9140(02)00030-9
   PubMed Web of Science ®Google Scholar