Black Tea Samples Origin Discrimination Using Analytical Investigations of Secondary Metabolites, Antiradical Scavenging Activity and Chemometric Approach

Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry
Wojciech KochŁukasz Komsta

Abstract

A comprehensive study on the composition and antioxidant properties of black tea samples with a chemometric approach was performed via LC-ESI-Q-TOF-MS, DPPH radical scavenging assay, and Folin-Ciocalteu assay (TPC). Marked differences between the teas from seven different countries (China, India, Iran, Japan, Kenya, Nepal, Sri Lanka) were shown. The Indian samples demonstrated the highest total catechin content (184.8 mg/100 mL), the largest TPC and DPPH scavenging potential (58.2 mg/100 mL and 84.5%, respectively). The applied principal component analysis (PCA) and ANOVA revealed several correlations between the level of catechins in tea infusions. EC (epicatechin), ECG (epicatechin gallate), EGC (epigallocatechin), and EGCG (epigallocatechin-3-gallate) content was not correlated with DPPH, gallic acid, and TPC; however, a strong correlation of EC and ECG between themselves and a negative correlation of these two catechins with EGCG and EGC was noted. Interestingly, simple catechins were not found to be responsible for antioxidant properties of the black teas. The samples collected in the higher altitudes were similar.

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Citations

May 18, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Nenad NaumovskiDemosthenes Panagiotakos
Aug 16, 2019·Journal of the Science of Food and Agriculture·Shimao FangJingming Ning
Nov 28, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Wojciech KochWirginia Kukula-Koch
Dec 13, 2019·Oxidative Medicine and Cellular Longevity·Gulsim ZhumashovaZuriyadda Sakipova
Jul 13, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Wojciech KochKazimierz Głowniak
May 30, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Alessandra Durazzo, Massimo Lucarini
Aug 15, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Tao TongSeong-Gook Kang
May 10, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Wojciech KochEwelina Gumbarewicz
Sep 1, 2019·Comprehensive Reviews in Food Science and Food Safety·Liang ZhangDaniel Granato

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Methods Mentioned

BETA
PCA

Software Mentioned

Statistica

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