Catechins and antioxidant activity of tea products

Authors

  • I. Chkhikvishvili Institute of Medical Biotechnology of Tbilisi State Medical University; 33, Vazha Pshavela Ave., Tbilisi, 0186, Georgia
  • T. Revishvili Institute of Medical Biotechnology of Tbilisi State Medical University; 33, Vazha Pshavela Ave., Tbilisi, 0186, Georgia
  • D. Apkhazava Institute of Medical Biotechnology of Tbilisi State Medical University; 33, Vazha Pshavela Ave., Tbilisi, 0186, Georgia
  • N. Gogia Institute of Medical Biotechnology of Tbilisi State Medical University; 33, Vazha Pshavela Ave., Tbilisi, 0186, Georgia
  • M. Esaishvili Institute of Medical Biotechnology of Tbilisi State Medical University; 33, Vazha Pshavela Ave., Tbilisi, 0186, Georgia
  • D. Chkhikvishvili Institute of Medical Biotechnology of Tbilisi State Medical University; 33, Vazha Pshavela Ave., Tbilisi, 0186, Georgia

Keywords:

Tea, Catechins, Antioxidant activity, HPLC, Individual catechins, Tea leaf

Abstract

The paper presents the results of studies of catechins and antioxidant activities of extracts of various experimental and commercial types of tea by using High-performance liquid chromatography method (HPLC). The best solvent eluents of the stationary phase of this method and the two different detection waves have been established. The study presents catechins and antioxidant activities of 12 different kinds and origins of experimental and commercial tea extracts. The quantitative composition of the four catechins in commercial tea samples has been studied in detail. Due to the chemical composition of raw materials and processing technology, high values of antioxidant activity and amount of catechins - epigallocatechingallate and epigallocatechine in experimental and commercial samples of Georgian green, red and black tea have been determined.

Additional Files

Published

22-07-2021

How to Cite

Chkhikvishvili, I., Revishvili, T., Apkhazava, D., Gogia, N., Esaishvili, M., & Chkhikvishvili, D. (2021). Catechins and antioxidant activity of tea products. The Journal of Nature Studies - Annals of Agrarian Science, 19(1). Retrieved from https://journals.org.ge/index.php/aans/article/view/263

Issue

Vol. 19 No. 1 (2021): Annals of Agrarian Science

Section

Articles