The status of micronutrients (Cu, Fe, Mn, Zn) in tea and tea infusions in selected samples imported to the Czech Republic
A total of 30 tea samples of different origins, thirteen green tea samples, thirteen black tea samples, two semi-fermented tea samples and one white tea, imported to the Czech Republic, were collected and analysed for the total content of copper, iron, manganese, and zinc in tea leaves and tea infus...
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| Format: | Article |
| Language: | English |
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Czech Academy of Agricultural Sciences
2006-04-01
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| Series: | Czech Journal of Food Sciences |
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| Online Access: | https://cjfs.agriculturejournals.cz/artkey/cjf-200602-0003_the-status-of-micronutrients-cu-fe-mn-zn-in-tea-and-tea-infusions-in-selected-samples-imported-to-the-czec.php |
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| author | Renée Street Jiřina Száková Ondřej Drábek Lenka Mládková |
| author_facet | Renée Street Jiřina Száková Ondřej Drábek Lenka Mládková |
| author_sort | Renée Street |
| collection | DOAJ |
| description | A total of 30 tea samples of different origins, thirteen green tea samples, thirteen black tea samples, two semi-fermented tea samples and one white tea, imported to the Czech Republic, were collected and analysed for the total content of copper, iron, manganese, and zinc in tea leaves and tea infusions. The total contents of metals in tea leaves differ according to the type of tea (green or black) and are probably influenced by many other factors, e.g. soil properties. The total contents of Mn were much higher compared to the total contents of Cu, Fe, and Zn, and varied between 511-2220 mg/kg. To compare easily hot water soluble concentrations of Cu, Fe, Mn and Zn, 5 min, 60 min, and 24 h infusions were prepared. The extractability of the elements was in the order Cu > Zn > Mn > Fe. The proportions of the element contents in the infusion related to the respective total contents in leaves were 30 ± 16% Cu, 26 ± 10% Zn, 18 ± 10% Mn, and 1.5 ± 0.8% Fe, respectively. The results confirmed that tea infusion can be an important dietary source of Mn. |
| first_indexed | 2024-04-10T08:36:08Z |
| format | Article |
| id | doaj.art-9101933ccf6344a6a3259057d2c3e540 |
| institution | Directory Open Access Journal |
| issn | 1212-1800 1805-9317 |
| language | English |
| last_indexed | 2024-04-10T08:36:08Z |
| publishDate | 2006-04-01 |
| publisher | Czech Academy of Agricultural Sciences |
| record_format | Article |
| series | Czech Journal of Food Sciences |
| spelling | doaj.art-9101933ccf6344a6a3259057d2c3e5402023-02-23T03:27:01ZengCzech Academy of Agricultural SciencesCzech Journal of Food Sciences1212-18001805-93172006-04-01242627110.17221/3301-CJFScjf-200602-0003The status of micronutrients (Cu, Fe, Mn, Zn) in tea and tea infusions in selected samples imported to the Czech RepublicRenée Street0Jiřina Száková1Ondřej Drábek2Lenka Mládková3Department of Soil Science and Geology andDepartment of Agrochemistry and Plant Nutrition, Faculty of Agrobiology, Food and Natural Resources, Czech University of Agriculture in Prague, Prague, Czech RepublicDepartment of Soil Science and Geology andDepartment of Soil Science and Geology andA total of 30 tea samples of different origins, thirteen green tea samples, thirteen black tea samples, two semi-fermented tea samples and one white tea, imported to the Czech Republic, were collected and analysed for the total content of copper, iron, manganese, and zinc in tea leaves and tea infusions. The total contents of metals in tea leaves differ according to the type of tea (green or black) and are probably influenced by many other factors, e.g. soil properties. The total contents of Mn were much higher compared to the total contents of Cu, Fe, and Zn, and varied between 511-2220 mg/kg. To compare easily hot water soluble concentrations of Cu, Fe, Mn and Zn, 5 min, 60 min, and 24 h infusions were prepared. The extractability of the elements was in the order Cu > Zn > Mn > Fe. The proportions of the element contents in the infusion related to the respective total contents in leaves were 30 ± 16% Cu, 26 ± 10% Zn, 18 ± 10% Mn, and 1.5 ± 0.8% Fe, respectively. The results confirmed that tea infusion can be an important dietary source of Mn.https://cjfs.agriculturejournals.cz/artkey/cjf-200602-0003_the-status-of-micronutrients-cu-fe-mn-zn-in-tea-and-tea-infusions-in-selected-samples-imported-to-the-czec.phpteatea infusioncopperironmanganesezincnutrient status |
| spellingShingle | Renée Street Jiřina Száková Ondřej Drábek Lenka Mládková The status of micronutrients (Cu, Fe, Mn, Zn) in tea and tea infusions in selected samples imported to the Czech Republic Czech Journal of Food Sciences tea tea infusion copper iron manganese zinc nutrient status |
| title | The status of micronutrients (Cu, Fe, Mn, Zn) in tea and tea infusions in selected samples imported to the Czech Republic |
| title_full | The status of micronutrients (Cu, Fe, Mn, Zn) in tea and tea infusions in selected samples imported to the Czech Republic |
| title_fullStr | The status of micronutrients (Cu, Fe, Mn, Zn) in tea and tea infusions in selected samples imported to the Czech Republic |
| title_full_unstemmed | The status of micronutrients (Cu, Fe, Mn, Zn) in tea and tea infusions in selected samples imported to the Czech Republic |
| title_short | The status of micronutrients (Cu, Fe, Mn, Zn) in tea and tea infusions in selected samples imported to the Czech Republic |
| title_sort | status of micronutrients cu fe mn zn in tea and tea infusions in selected samples imported to the czech republic |
| topic | tea tea infusion copper iron manganese zinc nutrient status |
| url | https://cjfs.agriculturejournals.cz/artkey/cjf-200602-0003_the-status-of-micronutrients-cu-fe-mn-zn-in-tea-and-tea-infusions-in-selected-samples-imported-to-the-czec.php |
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