ArticleChemistry Central journal2016
Determination of heavy metals in the soils of tea plantations and in fresh and processed tea leaves: an evaluation of six digestion methods.
Article in Chemistry Central journal, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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12 citing papers in PubMed, 96 citations in OpenAlex.
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- Effects of Geographical Origin and Tree Age on the Stable Isotopes and Multi-Elements of Pu-erh Tea.Foods (Basel, Switzerland) · 2024Article
- The Potential Use of Near Infrared Spectroscopy (NIRS) to Determine the Heavy Metals and the Percentage of Blends in Tea.Foods (Basel, Switzerland) · 2024Article
- Essential and Potentially Toxic Elements (PTEs) Content in European Tea (Molecules (Basel, Switzerland) · 2023Article
- Transcriptome Analysis Reveals Differentially Expressed Genes Involved in Cadmium and Arsenic Accumulation in Tea Plant (Plants (Basel, Switzerland) · 2023Article
- Estimated daily intake of epichlorohydrin and certain heavy metals of bagged and loose black teas.Journal of food science and technology · 2023Article
- Umbilical Cord Blood Metal Mixtures and Birth Size in Bangladeshi Children.Environmental health perspectives · 2021Article
- Identification and inoculation of fungal strains fromSaudi journal of biological sciences · 2020Article
- Potential exposure to metals and health risks of metal intake from Tieguanyin tea production in Anxi, China.Environmental geochemistry and health · 2019Article
- Background element content in the lichen Pseudevernia furfuracea: a comparative analysis of digestion methods.Environmental monitoring and assessment · 2019Article
- Identifying Speed Hump, a Traffic Calming Device, as a Hotspot for Environmental Contamination in Traffic-Affected Urban Roads.ACS omega · 2017Article
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7 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundThe aim of this study was to determine the levels of cadmium (Cd), chromium (Cr), lead (Pb), arsenic (As) and selenium (Se) in (1) fresh tea leaves, (2) processed (black) tea leaves and (3) soils from tea plantations originating from Bangladesh.
methodsGraphite furnace atomic absorption spectrometry (GF-AAS) was used to evaluate six digestion methods, (1) nitric acid, (2) nitric acid overnight, (3) nitric acid-hydrogen peroxide, (4) nitric-perchloric acid, (5) sulfuric acid, and (6) dry ashing, to determine the most suitable digestion method for the determination of heavy metals in the samples.
resultsThe concentration ranges of Cd, Pb, As and Se in fresh tea leaves were from 0.03-0.13, 0.19-2.06 and 0.47-1.31 µg/g, respectively while processed tea contained heavy metals at different concentrations: Cd (0.04-0.16 µg/g), Cr (0.45-10.73 µg/g), Pb (0.07-1.03 µg/g), As (0.89-1.90 µg/g) and Se (0.21-10.79 µg/g). Moreover, the soil samples of tea plantations also showed a wide range of concentrations: Cd (0.11-0.45 µg/g), Pb (2.80-66.54 µg/g), As (0.78-4.49 µg/g), and Se content (0.03-0.99 µg/g). Method no. 2 provided sufficient time to digest the tea matrix and was the most efficient method for recovering Cd, Cr, Pb, As and Se. Methods 1 and 3 were also acceptable and can be relatively inexpensive, easy and fast. The heavy metal transfer factors in the investigated soil/tea samples decreased as follows: Cd > As > Se > Pb.
conclusionOverall, the present study gives current insights into the heavy metal levels both in soils and teas commonly consumed in Bangladesh.
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