ArticleMolecules (Basel, Switzerland)2021
Analytical Assessment of Bioelements in Various Types of Black Teas from Different Geographical Origins in View of Chemometric Approach.
Article in Molecules (Basel, Switzerland), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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6 citing papers in PubMed.
- Biochemical Profiles, Mineral Accumulation, and Water-Soluble Fluoride Traits of 65 Tea (Plants (Basel, Switzerland) · 2026Article
- From Cup to Scan: The Impact of Black Tea on Magnetic Resonance Cholangiopancreatography Signal SuppressionCurrent medical imaging · 2025Article
- Elemental Profiling of North-East Indian Tea (Camellia sinensis) by ICP-MS and Assessment of Associated Health Risk.Biological trace element research · 2023Article
- Effects of Fermentation Time and Type of Tea on the Content of Micronutrients in Kombucha Fermented Tea.Nutrients · 2022Article
- Special Issue "Natural Plant Substances-Structural and Application Aspects: A Theme Issue in Honor of Professor Wieslaw Oleszek".Molecules (Basel, Switzerland) · 2022Article
- Dietary Intake of Toxic Heavy Metals with Major Groups of Food Products-Results of Analytical Determinations.Nutrients · 2022Article
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9 authors.
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Abstract
A comprehensive approach to the mineral composition of black teas of different origins was studied using the Flame Atomic Absorption Spectrometry (FAAS) method, supported by chemometric tools including Principal Component Analysis PCA) and Classification and Regression Trees (CART). Significant differences between the teas from seven countries (Japan, Nepal, Kenya, Iran, Sri Lanka, India, and China) were shown. K was the main element determined in all teas, with an average concentration of 11,649 mg/kg, followed by Ca, Mg and Mn. In general, regarding all investigated black teas, the element content was ranked in the following order: K > Ca > Mg > Mn > Fe > Na > Zn > Cu. The applied chemometric methods allowed us to recognize black tea clusters based on their mineral composition and place of cultivation, and allowed us to find correlations between particular elements in black teas. The performed analyses revealed interesting correlations between the concentration of various elements in black teas: K was negatively correlated with Na, Fe, Mn and Cu; K was positively correlated with the content of Ca and Mg. Significant positive correlations between Mn and Fe and Mn and Zn in the studied black tea samples were also revealed. It was shown that mineral composition may be a significant factor regarding the origin of the black tea, not only considering the country, but also the region or province.
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