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Concentrations and solubility of selected trace metals in leaf and bagged black teas commercialized in Poland
The objective of this study was to determine the concentrations of heavy metals in bagged and leaf black teas of the same brand and evaluate the percentage transfer of metals to tea infusion to assess the consumer exposure. Ten leaf black teas and 10 bagged black teas of the same brand available in...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Taiwan Food and Drug Administration
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9351806/ https://www.ncbi.nlm.nih.gov/pubmed/28911707 http://dx.doi.org/10.1016/j.jfda.2014.08.003 |
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author | Polechońska, L. Dambiec, M. Klink, A. Rudecki, A. |
author_facet | Polechońska, L. Dambiec, M. Klink, A. Rudecki, A. |
author_sort | Polechońska, L. |
collection | PubMed |
description | The objective of this study was to determine the concentrations of heavy metals in bagged and leaf black teas of the same brand and evaluate the percentage transfer of metals to tea infusion to assess the consumer exposure. Ten leaf black teas and 10 bagged black teas of the same brand available in Poland were analyzed for Zn, Mn, Cd, Pb, Ni, Co, Cr, Al, and Fe concentrations both in dry material and their infusion. The bagged teas contained higher amounts of Pb, Mn, Fe, Ni, Al, and Cr compared with leaf teas of the same brand, whereas the infusions of bagged tea contained higher levels of Mn, Ni, Al, and Cr compared with leaf tea infusions. Generally, the most abundant trace metals in both types of tea were Al and Mn. There was a wide variation in percentage transfer of elements from the dry tea materials to the infusions. The solubility of Ni and Mn was the highest, whereas Fe was insoluble and only a small portion of this metal content may leach into infusion. With respect to the acceptable daily intake of metals, the infusions of both bagged and leaf teas analyzed were found to be safe for human consumption. |
format | Online Article Text |
id | pubmed-9351806 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Taiwan Food and Drug Administration |
record_format | MEDLINE/PubMed |
spelling | pubmed-93518062022-08-09 Concentrations and solubility of selected trace metals in leaf and bagged black teas commercialized in Poland Polechońska, L. Dambiec, M. Klink, A. Rudecki, A. J Food Drug Anal Original Article The objective of this study was to determine the concentrations of heavy metals in bagged and leaf black teas of the same brand and evaluate the percentage transfer of metals to tea infusion to assess the consumer exposure. Ten leaf black teas and 10 bagged black teas of the same brand available in Poland were analyzed for Zn, Mn, Cd, Pb, Ni, Co, Cr, Al, and Fe concentrations both in dry material and their infusion. The bagged teas contained higher amounts of Pb, Mn, Fe, Ni, Al, and Cr compared with leaf teas of the same brand, whereas the infusions of bagged tea contained higher levels of Mn, Ni, Al, and Cr compared with leaf tea infusions. Generally, the most abundant trace metals in both types of tea were Al and Mn. There was a wide variation in percentage transfer of elements from the dry tea materials to the infusions. The solubility of Ni and Mn was the highest, whereas Fe was insoluble and only a small portion of this metal content may leach into infusion. With respect to the acceptable daily intake of metals, the infusions of both bagged and leaf teas analyzed were found to be safe for human consumption. Taiwan Food and Drug Administration 2015-01-02 /pmc/articles/PMC9351806/ /pubmed/28911707 http://dx.doi.org/10.1016/j.jfda.2014.08.003 Text en © 2015 Taiwan Food and Drug Administration https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/ (https://creativecommons.org/licenses/by-nc-nd/4.0/) ). |
spellingShingle | Original Article Polechońska, L. Dambiec, M. Klink, A. Rudecki, A. Concentrations and solubility of selected trace metals in leaf and bagged black teas commercialized in Poland |
title | Concentrations and solubility of selected trace metals in leaf and bagged black teas commercialized in Poland |
title_full | Concentrations and solubility of selected trace metals in leaf and bagged black teas commercialized in Poland |
title_fullStr | Concentrations and solubility of selected trace metals in leaf and bagged black teas commercialized in Poland |
title_full_unstemmed | Concentrations and solubility of selected trace metals in leaf and bagged black teas commercialized in Poland |
title_short | Concentrations and solubility of selected trace metals in leaf and bagged black teas commercialized in Poland |
title_sort | concentrations and solubility of selected trace metals in leaf and bagged black teas commercialized in poland |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9351806/ https://www.ncbi.nlm.nih.gov/pubmed/28911707 http://dx.doi.org/10.1016/j.jfda.2014.08.003 |
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