Evaluation of Macro- and Microelement Levels in Black Tea in View of Its Geographical Origin

The aim of this study was to evaluate the elemental composition of black tea samples and their infusions in view of their geographical origin. In total, 14 elements were analyzed, 13 (Ca, K, Mg, Na, Mn, Fe, Zn, Cu, Cr, Ni, Co, Cd, and Pb) by flame atomic absorption spectrometry, and P by UV-Vis spec...

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Autores principales: Brzezicha-Cirocka, Justyna, Grembecka, Małgorzata, Ciesielski, Tomasz, Flaten, Trond Peder, Szefer, Piotr
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer US 2016
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5344953/
https://www.ncbi.nlm.nih.gov/pubmed/27637916
http://dx.doi.org/10.1007/s12011-016-0849-2
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author Brzezicha-Cirocka, Justyna
Grembecka, Małgorzata
Ciesielski, Tomasz
Flaten, Trond Peder
Szefer, Piotr
author_facet Brzezicha-Cirocka, Justyna
Grembecka, Małgorzata
Ciesielski, Tomasz
Flaten, Trond Peder
Szefer, Piotr
author_sort Brzezicha-Cirocka, Justyna
collection PubMed
description The aim of this study was to evaluate the elemental composition of black tea samples and their infusions in view of their geographical origin. In total, 14 elements were analyzed, 13 (Ca, K, Mg, Na, Mn, Fe, Zn, Cu, Cr, Ni, Co, Cd, and Pb) by flame atomic absorption spectrometry, and P by UV-Vis spectrometry, after mineralization of samples. It was found that K was the most abundant macroelement in the analyzed samples, whereas among microelements, the highest concentration was found for Mn. Based on the obtained data, the percentage of elements leached into the infusions as well as the daily elemental intake from tea were calculated. The daily intake from tea was compared to the recommended daily allowances (RDAs), and the highest percentages of the RDAs were found for Mn (15 %) and Co (10 %). To study the relations between elemental composition and country of origin of samples, factor analysis and cluster analysis were applied. These multivariate techniques proved to be efficient tools able to differentiate samples according to their provenance as well as plantation within the common regions.
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spelling pubmed-53449532017-03-21 Evaluation of Macro- and Microelement Levels in Black Tea in View of Its Geographical Origin Brzezicha-Cirocka, Justyna Grembecka, Małgorzata Ciesielski, Tomasz Flaten, Trond Peder Szefer, Piotr Biol Trace Elem Res Article The aim of this study was to evaluate the elemental composition of black tea samples and their infusions in view of their geographical origin. In total, 14 elements were analyzed, 13 (Ca, K, Mg, Na, Mn, Fe, Zn, Cu, Cr, Ni, Co, Cd, and Pb) by flame atomic absorption spectrometry, and P by UV-Vis spectrometry, after mineralization of samples. It was found that K was the most abundant macroelement in the analyzed samples, whereas among microelements, the highest concentration was found for Mn. Based on the obtained data, the percentage of elements leached into the infusions as well as the daily elemental intake from tea were calculated. The daily intake from tea was compared to the recommended daily allowances (RDAs), and the highest percentages of the RDAs were found for Mn (15 %) and Co (10 %). To study the relations between elemental composition and country of origin of samples, factor analysis and cluster analysis were applied. These multivariate techniques proved to be efficient tools able to differentiate samples according to their provenance as well as plantation within the common regions. Springer US 2016-09-16 2017 /pmc/articles/PMC5344953/ /pubmed/27637916 http://dx.doi.org/10.1007/s12011-016-0849-2 Text en © The Author(s) 2016 Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
spellingShingle Article
Brzezicha-Cirocka, Justyna
Grembecka, Małgorzata
Ciesielski, Tomasz
Flaten, Trond Peder
Szefer, Piotr
Evaluation of Macro- and Microelement Levels in Black Tea in View of Its Geographical Origin
title Evaluation of Macro- and Microelement Levels in Black Tea in View of Its Geographical Origin
title_full Evaluation of Macro- and Microelement Levels in Black Tea in View of Its Geographical Origin
title_fullStr Evaluation of Macro- and Microelement Levels in Black Tea in View of Its Geographical Origin
title_full_unstemmed Evaluation of Macro- and Microelement Levels in Black Tea in View of Its Geographical Origin
title_short Evaluation of Macro- and Microelement Levels in Black Tea in View of Its Geographical Origin
title_sort evaluation of macro- and microelement levels in black tea in view of its geographical origin
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5344953/
https://www.ncbi.nlm.nih.gov/pubmed/27637916
http://dx.doi.org/10.1007/s12011-016-0849-2
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