Effect of altitude, shooting period, and tea grade on the catechins, caffeine, theaflavin, and thearubigin of Turkish black tea

Authors : Feramuz ÖZDEMİR, Hilal Şahin NADEEM, Aybegüm AKDOĞAN, Cüneyt DİNÇER, Ayhan TOPUZ

Pages : 334-340

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Publication Date : 2018-10-01

Article Type : Research Paper

Abstract :The effect of altitude, shooting period, and tea grade on the catechins and caffeine contents of Turkish black tea was investigated. The experimental factors significantly affected all of the parameters analyzed. Epigallocatechin gallate was the major catechin of black tea insert ignore into journalissuearticles values(0.719-1.007 g 100 g-1 dm); followed by epigallocatechin insert ignore into journalissuearticles values(0.627-0.791 g 100 g-1 dm);. Additionally, caffeine insert ignore into journalissuearticles values(1.810-2.175 g 100 g-1 dm);, theaflavin insert ignore into journalissuearticles values(3.201-6.000 μmol g-1);, and thearubigin insert ignore into journalissuearticles values(8.577-12.635 g 100 g-1 dm); contents were determined. Samples of tea grown at high altitude generally produced a considerably greater amount of the catechins that improve tea quality. Shooting period, which is specific to tea cultivation in Turkey, significantly affected almost all of the quality parameters of black tea. Tea produced in the first shooting period contained more catechins than the samples plucked in the following shooting periods. Dust and orange pekoe 1 contained the most catechins of the tea grades analyzed.
Keywords : Altitude, black tea, catechins, caffeine, shooting period