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Updated: Aug 13, 2026

Source and Route of Pyrrolizidine Alkaloid Contamination in Tea Samples
Published on: September 28, 2022
[Preparation and component analysis of tea pigments]
Daxiang Li1, Xiaochun Wan, Tao Xia
1Key Laboratory of Tea Biochemistry & Biotechnology, Ministry of Agricultural, Anhui Agriculture University, Hefei 230036, China.
Objective:
To prepare tea pigments.
Methods:
Tea pigments are prepared by solvent extraction from Sri lanka black tea.
Results:
Tea pigments contains the components as follows: caffeine 1.77%, epigallocatechin 1.37%, catechin 1.20%, epicatechin 9.55%, epigallocatechin gallate 10.52%, epicatechin gallate 9.94%, theaflavin 10.34%, theaflavin monogallate 9.57%, theaflavin digallate 4.81%, thearubigin about 40.93%.
Conclusion:
The best proportions of the compound that are obtained with HPLC analysis.

