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Adelusi OA, Oladeji OM, Gbashi S, Njobeh PB. Influence of geographical location on the distribution of heavy metals in dairy cattle feeds sourced from two South African provinces. Food Sci Nutr 2024; 12:4223-4232. [PMID: 38873466 PMCID: PMC11167146 DOI: 10.1002/fsn3.4082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 02/20/2024] [Accepted: 02/27/2024] [Indexed: 06/15/2024] Open
Abstract
The contamination of feed and food by heavy metals represents a significant concern for the health of both animals and humans. This study investigates the impact of geographical location on heavy metal distribution in dairy cattle feeds sourced from Free State and Limpopo, South Africa (SA). A total of 70 feed samples (40 from Free State and 30 from Limpopo) were collected from 2018 to 2019 and analyzed for heavy metals, including cadmium (Cd), arsenic (As), copper (Cu), zinc (Zn), lead (Pb), and chromium (Cr), using inductively coupled plasma mass spectrometry (ICP-MS). Our findings revealed the presence of Cr, Cu, and Zn in the feeds, but at levels below the FAO/WHO permissible limits. Additionally, As, Cd, and Pb concentrations in the feeds were below the Limit of Detections (LODs). Generally, Cr concentrations (0.032-0.454 mg/kg) identified in the Free State samples were lower than those found in Limpopo (0.038-1.459 mg/kg), while the levels of Cu (0.092-4.898 mg/kg) and Zn (0.39-13.871 mg/kg) recorded in the Free State samples were higher than those from Limpopo [(0.126-3.467 mg/kg) and (0.244-13.767 mg/kg), respectively]. According to independent sample t-tests, Cu and Zn levels were substantially higher (p ≤ .05) in Free State feeds compared to Limpopo, while Limpopo feeds exhibited significantly higher (p ≤ .05) Cr concentrations than Free State feeds. Despite the low recorded heavy metal levels, regular monitoring of these elements in cow diets across all SA provinces is essential for ensuring the well-being of animals and humans.
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Affiliation(s)
- Oluwasola Abayomi Adelusi
- Department of Biotechnology and Food Technology, Faculty of ScienceUniversity of JohannesburgJohannesburgSouth Africa
| | - Oluwaseun Mary Oladeji
- Department of Biology and Environmental Science, Faculty of ScienceSefako Makgatho Health Sciences UniversityPretoriaSouth Africa
| | - Sefater Gbashi
- Department of Biotechnology and Food Technology, Faculty of ScienceUniversity of JohannesburgJohannesburgSouth Africa
| | - Patrick Berka Njobeh
- Department of Biotechnology and Food Technology, Faculty of ScienceUniversity of JohannesburgJohannesburgSouth Africa
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2
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Harrison DM, Chang WC, Lin HT. Dietary Exposure and Health Risk Assessment of Polycyclic Aromatic Hydrocarbons in Black Tea Consumed in Taiwan. TOXICS 2024; 12:134. [PMID: 38393229 PMCID: PMC10892830 DOI: 10.3390/toxics12020134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Revised: 01/30/2024] [Accepted: 02/02/2024] [Indexed: 02/25/2024]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are organic compounds found in many foods and drinks, and there have been some concerns over these compounds due to their carcinogenic nature. This study evaluated the concentrations of PAH4 (BaP, BaA, BbF, and CHR) in different black tea infusions and drinks based on the origin of the tea. The release of PAH4 from tea leaves to tea infusions was significantly low, with the highest transfer being 25.81%. The mean concentrations of BaP and PAH4 in tea infusions were used to conduct a risk assessment for the Taiwanese population, which showed that the 19-65 age group had the highest estimated intake of PAH4 and BaP among all age groups. These results, however, also showed margin of exposure (MOE) values well above the benchmark of 10,000. This indicated that PAH exposure from black tea consumption for the Taiwanese population constitutes a low-level health concern.
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Affiliation(s)
- Drewyan Minelly Harrison
- International Master Program of Agriculture, National Chung Hsing University, Taichung 402-202, Taiwan;
| | - Wei-Chung Chang
- Graduate Institute of Food Safety, National Chung Hsing University, Taichung 402-202, Taiwan;
| | - Hsin-Tang Lin
- Graduate Institute of Food Safety, National Chung Hsing University, Taichung 402-202, Taiwan;
- Department of Food Science and Biotechnology, National Chung Hsing University, Taichung 402-202, Taiwan
- Department of Law, National Chung Hsing University, Taichung 402-202, Taiwan
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3
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Lu Y, Han H, Huang X, Yi Y, Wang Z, Chai Y, Zhang X, Lu C, Wang C, Chen H. Uptake and translocation of organic pollutants in Camellia sinensis (L.): a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:118133-118148. [PMID: 37936031 DOI: 10.1007/s11356-023-30441-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 10/09/2023] [Indexed: 11/09/2023]
Abstract
Camellia sinensis (L.) is a perennial evergreen woody plant with the potential for environmental pollution due to its unique growth environment and extended growth cycle. Pollution sources and pathways for tea plants encompass various factors, including atmospheric deposition, agricultural inputs of chemical fertilizers and pesticide, uptake from soil, and sewage irrigation. During the cultivation phase, Camellia sinensis (L.) can absorb organic pollutants through its roots and leaves. This review provides an overview of the uptake and translocation mechanisms involving the absorption of polycyclic aromatic hydrocarbons (PAHs), pesticides, anthraquinone (AQ), perchlorate, and other organic pollutants by tea plant roots. Additionally, we summarize how fresh tea leaves can be impacted by spraying pesticide and atmospheric sedimentation. In conclusion, this review highlights current research progress in understanding the pollution risks associated with Camellia sinensis (L.) and its products, emphasizing the need for further investigation and providing insights into potential future directions for research in this field.
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Affiliation(s)
- Yuting Lu
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, 310008, China
- Graduate School of Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Haolei Han
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, 310008, China
- Graduate School of Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Xuchen Huang
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, 310008, China
- Graduate School of Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Yuexing Yi
- School of Chemical Engineering and Materials, Zhejiang University of Technology, Hangzhou, 310008, China
| | - Ziqi Wang
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, 310008, China
- School of Chemical Engineering and Materials, Zhejiang University of Technology, Hangzhou, 310008, China
| | - Yunfeng Chai
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, 310008, China
- Key Laboratory of Tea Quality and Safety & Risk Assessment, Ministry of Agriculture, Hangzhou, 310008, China
- Key Laboratory of Tea Quality and Safety Control, Ministry of Agriculture and Rural Affairs, Hangzhou, 310008, China
| | - Xiangchun Zhang
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, 310008, China
- Key Laboratory of Tea Quality and Safety & Risk Assessment, Ministry of Agriculture, Hangzhou, 310008, China
- Key Laboratory of Tea Quality and Safety Control, Ministry of Agriculture and Rural Affairs, Hangzhou, 310008, China
| | - Chengyin Lu
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, 310008, China
- Key Laboratory of Tea Quality and Safety & Risk Assessment, Ministry of Agriculture, Hangzhou, 310008, China
- Key Laboratory of Tea Quality and Safety Control, Ministry of Agriculture and Rural Affairs, Hangzhou, 310008, China
| | - Chen Wang
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, 310008, China
- Key Laboratory of Tea Quality and Safety & Risk Assessment, Ministry of Agriculture, Hangzhou, 310008, China
- Key Laboratory of Tea Quality and Safety Control, Ministry of Agriculture and Rural Affairs, Hangzhou, 310008, China
| | - Hongping Chen
- Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, 310008, China.
- Key Laboratory of Tea Quality and Safety & Risk Assessment, Ministry of Agriculture, Hangzhou, 310008, China.
- Key Laboratory of Tea Quality and Safety Control, Ministry of Agriculture and Rural Affairs, Hangzhou, 310008, China.
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4
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Li F, Jing M, Ma F, Wang W, Li M. Comparison and Risk Assessment of Macroelements and Trace Metals in Commercial Teas from Different Regions of China. Biol Trace Elem Res 2023; 201:1503-1519. [PMID: 35467266 DOI: 10.1007/s12011-022-03232-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Accepted: 04/04/2022] [Indexed: 02/07/2023]
Abstract
Tea (Camellia sinensis L.) is one of the most widely consumed non-alcoholic beverages worldwide. In the present study, 73 commercial tea samples were collected from tea plantations in the Southwest, South, Jiangnan, and Jiangbei regions of China. The contents of four macroelements (phosphorus (P), potassium (K), calcium (Ca) and magnesium (Mg)) and 15 trace metals (arsenic (As), cadmium (Cd), chromium (Cr), mercury (Hg), lead (Pb), zinc (Zn), aluminium (Al), copper (Cu), manganese (Mn), iron (Fe), nickel (Ni), thorium (Th), thallium (Tl), rubidium (Rb) and barium (Ba)) in tea samples were determined. The mean concentrations of As, Cd, Cr, Hg, Pb, Zn, Al, Cu, Mn, Fe, Ni, Th, Tl, Rb and Ba were in the range of 0.02-0.61, 0.008-0.126, 0.09-1.12, 0.001-0.012, 0.07-1.62, 19.5-73.2, 170-2100, 5.9-43.3, 228-2040, 60-337, 2.09-17.95, 0.002-0.08, 0.004-0.409, 0-150.50 and 3.1-41.2 µg/g, respectively, which were all lower than the maximum permissible limits stipulated by China (NY/T 288-2012, NY 659-2003). The target hazard quotients of each heavy metal were lower than one, and the combined risk hazard index of all heavy metals for adults was in the range of 0.10-0.85; therefore, there was no significant carcinogenic health risks to tea drinking consumers under the current dietary intake. Significant differences were found in the content of trace elements (Zn, Cu, Fe, Ni, Th, Tl, Rb and Ba) (p < 0.05); however, no significant differences were found in the content of macroelements (P, K, Ca and Mg) and trace metals (As, Cd, Cr, Hg, Pb, Al and Mn) in teas from different regions. Therefore, the region did not affect the heavy metal exposure risk. Correlation coefficient and principal component analyses were performed to determine the source of the elements. Three principal factors were obtained: factor 1 was positively related to Ca, Mg, As, Cd, Cr, Hg, Pb, Al, Mn, Fe and Th (32.63%); factor 2 to P, Zn, Cu and Ni (18.64%) and factor 3 to K and Rb (10.10%). Thus, the elements in the same factor might originate from the same source. This study provides an essential basis to understand the variance and potential risks of different elements in tea from different regions of China.
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Affiliation(s)
- Fen Li
- College of Tea (Pu'er), West Yunnan University of Applied Sciences, Pu'er 665000, China
| | - Min Jing
- The Key Laboratory of Environmental Pollution Monitoring and Disease Control, School of Public Health, Ministry of Education, Guizhou Medical University, Guiyang, 550025, China
| | - Fujie Ma
- College of Tea (Pu'er), West Yunnan University of Applied Sciences, Pu'er 665000, China
| | - Wei Wang
- College of Tea (Pu'er), West Yunnan University of Applied Sciences, Pu'er 665000, China
| | - Mei Li
- College of Tea (Pu'er), West Yunnan University of Applied Sciences, Pu'er 665000, China.
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Dietary intake and health risk assessment of lead and cadmium in green tea from Morocco. J Verbrauch Lebensm 2023. [DOI: 10.1007/s00003-023-01422-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
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6
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Wang Y, Zhang S, Wang Y, Wu X, Zou Y, Zhou W, Wang P, Cheng J, Dong S. Concentration and risk assessment of PCNs in green tea in different locations in China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 847:157587. [PMID: 35882323 DOI: 10.1016/j.scitotenv.2022.157587] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2022] [Revised: 07/19/2022] [Accepted: 07/19/2022] [Indexed: 06/15/2023]
Abstract
Polychlorinated naphthalenes (PCNs) were added to the Stockholm Convention list of persistent organic pollutants in 2015. PCNs are mainly unintentionally produced during industrial processes nowadays, and can be widely found in environmental media and foodstuffs. Dietary intake is the primary pathway for human exposure to PCNs. PCNs in different categories of foodstuffs have been reported. However, little information on PCN concentrations in green tea, a popular beverage worldwide is available. In this study, all 75 PCN congener concentrations and distributions in green tea samples (n = 102) from 11 regions in China were determined, and risk assessment of human exposure to PCNs through tea consumption was conducted. The PCN concentrations in all the green tea samples were 3.62-175 pg/g dry weight (mean 36.1 pg/g dry weight). Similar PCN homolog and congener profiles were found in green tea samples from different areas. The dominant PCN homologs in all of the green tea samples were di-CNs, tetra-CNs, and tri-CNs. No direct relationships were found between PCN emission sources and PCN concentrations in the green tea samples. The brewing technique could affect the PCN concentrations and homolog profiles in tea leaves. PCNs in green tea from China were found to pose little risk to humans.
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Affiliation(s)
- Yaxin Wang
- Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Su Zhang
- Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Yujiao Wang
- College of Science, China Agricultural University, Beijing 100193, China
| | - Xingyi Wu
- College of Science, China Agricultural University, Beijing 100193, China
| | - Yun Zou
- Organic Biological Analytical Chemistry Group, Department of Chemistry, University of Liège, Liège 4000, Belgium
| | - Wenfeng Zhou
- College of Science, China Agricultural University, Beijing 100193, China
| | - Peilong Wang
- Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Jie Cheng
- Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Shujun Dong
- Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
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7
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Du M, Li X, Cai D, Zhao Y, Li Q, Wang J, Gu W, Li Y. In-silico study of reducing human health risk of POP residues' direct (from tea) or indirect exposure (from tea garden soil): Improved rhizosphere microbial degradation, toxicity control, and mechanism analysis. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 242:113910. [PMID: 35917712 DOI: 10.1016/j.ecoenv.2022.113910] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 07/04/2022] [Accepted: 07/19/2022] [Indexed: 06/15/2023]
Abstract
The accumulation of potentially harmful substances in tea garden soils and tea leaves, especially persistent organic pollutants (POPs), is a special concern for tea consumers worldwide. However, their potential health and ecological risks in tea gardens have rarely been investigated. This study proposed measures to improve the degradation ability of POPs by the tea rhizosphere and to reduce the human health risks caused by POPs after tea consumption. In this study, the binding energy values of six types of POPs and the degraded protein were used to reflect the degradation ability and calculated using molecular dynamic simulations. The main root secretions (i.e., catechin, glucose, arginine, and oxalic acid) were selected and applied with a combination of tea fertilizer and trace element combination (i.e., urea, straw, and copper element), leading to an improved degradation ability (49.59 %) of POPs. To investigate the mechanisms of the factors that affect the degradation ability, molecular docking, tensor singular value decomposition methods, multivariate correlation analysis and 2D-QSAR model were used. The results showed that the solvation energy and solvent accessible surface area are the main forces, and the molecular weight, boiling point, and topological radius of the POPs were the key molecular features affecting their degradation ability. Based on the three key characteristics, a diet avoidance scheme (i.e., avoiding lysine, maslinic acid, ethanol, perfluorocaproic acid, and cholesterol with tea), which can reduce the binding ability of POP residues to aromatic hydrocarbon receptors by 506.13 %. This work will provide theoretical strategies to improve the quality and safety of tea production and reduce the potential risks of harmful substance residues in tea garden soils and tea leaves.
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Affiliation(s)
- Meijin Du
- College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China
| | - Xixi Li
- Northern Region Persistent Organic Pollution Control (NRPOP) Laboratory, Faculty of Engineering and Applied Science, Memorial University, St. John's, NL A1B 3X5, Canada
| | - Dongshu Cai
- Institute of Information Engineering, CAS, Beijing 100093, China
| | - Yuanyuan Zhao
- College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China
| | - Qing Li
- College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China
| | - Jianjun Wang
- College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China
| | - Wenwen Gu
- College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China.
| | - Yu Li
- College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China
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8
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Na Nagara V, Sarkar D, Luo Q, Biswas JK, Datta R. Health Risk Assessment of Exposure to Trace Elements from Drinking Black and Green Tea Marketed in Three Countries. Biol Trace Elem Res 2022; 200:2970-2982. [PMID: 34378169 DOI: 10.1007/s12011-021-02863-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 07/30/2021] [Indexed: 12/07/2022]
Abstract
Although tea can be beneficial for our health, consuming excess trace elements in tea can be harmful. In this study, the carcinogenic and noncarcinogenic health risk for trace elements in tea influenced by the country of origin, tea type, and infusion process was assessed. Tea (Camellia sinensis) purchased from China, India, and the USA, including black and green tea, were analyzed for essential micronutrients (Cu, Se, and Zn) and nonessential trace elements (Ag, As, Ba, Cd, Cr, and Pb) in leaves and three types of infusions. The results showed that country of origin, tea type, and infusion process had a significant influence on the trace element contents in tea leaves and infusions, also on health risk. Country of origin had a significant influence on Ba, Cr, Pb, and Zn contents in tea leaves and on As, Ba, Cd, Cr, Pb, and Zn contents in tea infusions. Black tea had significantly higher (p < 0.05) Cr and Cu content in tea leaves than green tea, but only Cr content was significantly higher (p < 0.05) than that of green tea in tea infusion. The trace element contents were the highest in the first infusion and decreased as the number of infusion steps increased. The results showed that the consumption of tea infusion was not likely to cause noncarcinogenic risk. However, the carcinogenic risk for As was of concern. Our results indicate that avoiding drinking the first infusion can help to reduce both carcinogenic and noncarcinogenic health risks for trace elements.
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Affiliation(s)
- Viravid Na Nagara
- Department of Civil, Environmental and Ocean Engineering, Stevens Institute of Technology, Hoboken, NJ, 07030, USA
| | - Dibyendu Sarkar
- Department of Civil, Environmental and Ocean Engineering, Stevens Institute of Technology, Hoboken, NJ, 07030, USA.
| | - Qingzi Luo
- Department of Civil, Environmental and Ocean Engineering, Stevens Institute of Technology, Hoboken, NJ, 07030, USA
| | - Jayanta Kumar Biswas
- Department of Ecological Studies & International Centre for Ecological Engineering, University of Kalyani, Kalyani, West Bengal, India
| | - Rupali Datta
- Department of Biological Sciences, Michigan Technological University, Houghton, MI, USA
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9
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Wang Y, Wu X, Wang Y, Zhang S, Dong S, Zhou W. Short- and medium-chain chlorinated paraffins in green tea from 11 Chinese provinces and their migration from packaging. JOURNAL OF HAZARDOUS MATERIALS 2022; 427:128192. [PMID: 35007805 DOI: 10.1016/j.jhazmat.2021.128192] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 12/08/2021] [Accepted: 12/29/2021] [Indexed: 06/14/2023]
Abstract
Chlorinated paraffins (CPs) have been found to occur ubiquitously in foodstuff of both animal and plant origin. However, limited information is available on the content of CPs in green tea, one of the most commonly consumed beverages worldwide. Herein, 107 commercial green tea samples originating from 11 provinces of China, were collected to study the occurrence of short- and medium-chain chlorinated paraffins (SCCPs and MCCPs, respectively). The concentration of SCCPs in all green tea samples ranged from 4.99 to 717 ng/g (mean: 55.7 ng/g), while MCCPs ranged from 2.55 to 543 ng/g (mean: 33.5 ng/g). CP profiles in green tea samples from different provinces exhibited no regional differences. To identify the potential sources of CPs in green tea, 19 tea packaging samples were collected and analyzed, showing that SCCPs and MCCPs existed at much higher concentrations in the tea packaging material than in the teas. Migration tests indicated that CPs could migrate from packaging into teas during storage, with the migration velocity and efficiency of SCCPs being higher than MCCPs.
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Affiliation(s)
- Yujiao Wang
- College of Science, China Agricultural University, Beijing 100193, China
| | - Xingyi Wu
- College of Science, China Agricultural University, Beijing 100193, China
| | - Yaxin Wang
- Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Su Zhang
- Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Shujun Dong
- Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Wenfeng Zhou
- College of Science, China Agricultural University, Beijing 100193, China.
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Abbasi E, Yousefi MH, Hashemi S, Hosseinzadeh S, Ghadimi AH, Safapour M, Azari A. Aflatoxin B1 and heavy metals in imported black tea to Bushehr, southern Iran; Contamination rate and risk assessment. J Food Compost Anal 2022. [DOI: 10.1016/j.jfca.2021.104277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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11
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Areo OM, Njobeh PB. Risk assessment of heavy metals in rooibos (Aspalathus linearis) tea consumed in South Africa. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:59687-59695. [PMID: 34145539 DOI: 10.1007/s11356-021-14968-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 06/14/2021] [Indexed: 06/12/2023]
Abstract
A total of 80 rooibos tea samples from a range of brands were purchased from various registered retail shops in South Africa. The samples were bought during 2019 winter (40) and summer (40) period which are classified as 6 natural rooibos, 18 herbal rooibos samples, and 16 flavor rooibos samples and subjected for heavy metal analysis such as chromium (Cr), iron (Fe), arsenic (As), cadmium (Cd), and lead (Pb) using inductively coupled plasma mass spectrometer (ICP-MS). Human health risks were determined by estimating the daily intake non-cancer hazard quotient (THQ) and hazard index (HI) via oral exposure to toxic elements based on daily tea consumption. The concentration range of the determined heavy metals in rooibos tea samples were as follows: Cr (0.17-11.98 mg/kg), Fe (31-450 mg/kg), As (ND-0.51 mg/kg), Cd (0.09-0.17 mg/kg), and Pb (0.06-2.73 mg/kg). Cr was found in higher amount when compared to the World Health Organization (WHO) permissive limit (1.3 mg/kg). The concentrations of all studied heavy metals during winter and summer period were compared using two-way Anova, and no significant differences (p = 0.832) were observed for the two seasons. Both the target risk quotient (THQ) and the hazard index (HI) levels in all analyzed tea were well below 1, implying that intake of rooibos tea with analyzed heavy metals should not cause a threat to human health. On the other hand, the continuous intake due to the high concentrations of trace metals such as Cr may pose a serious chronic health risk due to accumulation in body tissues over time. The study, therefore, suggests constant monitoring of these heavy metals in teas in order to limit the risk of exceeding the permissive limits.
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Affiliation(s)
- Oluwaseun Mary Areo
- Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg, Doornfontein Campus, P.O. Box 17011, Doornfontein, Gauteng, 2028, South Africa
| | - Patrick Berka Njobeh
- Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg, Doornfontein Campus, P.O. Box 17011, Doornfontein, Gauteng, 2028, South Africa.
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12
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Li J, Aziz MT, Granger CO, Richardson SD. Are Disinfection Byproducts (DBPs) Formed in My Cup of Tea? Regulated, Priority, and Unknown DBPs. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:12994-13004. [PMID: 34523331 DOI: 10.1021/acs.est.1c03419] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Globally, tea is the second most consumed nonalcoholic beverage next to drinking water and is an important pathway of disinfection byproduct (DBP) exposure. When boiled tap water is used to brew tea, residual chlorine can produce DBPs by the reaction of chlorine with tea compounds. In this study, 60 regulated and priority DBPs were measured in Twinings green tea, Earl Grey tea, and Lipton tea that was brewed using tap water or simulated tap water (nanopure water with chlorine). In many cases, measured DBP levels in tea were lower than in the tap water itself due to volatilization and sorption onto tea leaves. DBPs formed by the reaction of residual chlorine with tea precursors contributed ∼12% of total DBPs in real tap water brewed tea, with the remaining 88% introduced by the tap water itself. Of that 12%, dichloroacetic acid, trichloroacetic acid, and chloroform were the only contributing DBPs. Total organic halogen in tea nearly doubled relative to tap water, with 96% of the halogenated DBPs unknown. Much of this unknown total organic halogen (TOX) may be high-molecular-weight haloaromatic compounds, formed by the reaction of chlorine with polyphenols present in tea leaves. The identification of 15 haloaromatic DBPs using gas chromatography-high-resolution mass spectrometry indicates that this may be the case. Further studies on the identity and formation of these aromatic DBPs should be conducted since haloaromatic DBPs can have significant toxicity.
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Affiliation(s)
- Jiafu Li
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Md Tareq Aziz
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Caroline O Granger
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Susan D Richardson
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
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Rivera-Pérez A, Romero-González R, Garrido Frenich A. Persistent organic pollutants (PCBs and PCDD/Fs), PAHs, and plasticizers in spices, herbs, and tea - A review of chromatographic methods from the last decade (2010-2020). Crit Rev Food Sci Nutr 2021; 62:5224-5244. [PMID: 33563047 DOI: 10.1080/10408398.2021.1883546] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Edible and highly demanded plant-derived products such as herbs, spices, and tea may be subjected to exogenous contamination of well-known chemical hazards such as persistent organic pollutants (POPs), and emerging ones such as plasticizers, affecting negatively the safety of these food commodities. This fact has led to the increasing analysis of exogenous compounds including priority POPs such as polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs), and polychlorinated biphenyls (PCBs), as well as highly persistent polycyclic aromatic hydrocarbons (PAHs). Currently, plasticizer residues are also considered an emerging issue because of the extensive use in food packaging and potential migration into foodstuffs. In this review, the studies published from 2010 to 2020 were discussed, including the main extraction methods applied for these contaminants from herbs, spices, and tea, and it was revealed the trend toward the use of less solvent-consuming and time-effective methods. Chromatographic methods were also described, which were mainly combined with detection techniques such as classical or mass spectrometry (MS) detection. Finally, a comprehensive overview of the occurrence of these selected exogenous compounds was presented in the studied matrices, showing that their monitoring should be further investigated to ensure food safety of highly consumed condiments and tea.
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Affiliation(s)
- Araceli Rivera-Pérez
- Research Group "Analytical Chemistry of Contaminants", Department of Chemistry and Physics, Research Centre for Mediterranean Intensive Agrosystems and Agri-Food Biotechnology (CIAIMBITAL), Agrifood Campus of International Excellence (ceiA3), University of Almeria, Almeria, Spain
| | - Roberto Romero-González
- Research Group "Analytical Chemistry of Contaminants", Department of Chemistry and Physics, Research Centre for Mediterranean Intensive Agrosystems and Agri-Food Biotechnology (CIAIMBITAL), Agrifood Campus of International Excellence (ceiA3), University of Almeria, Almeria, Spain
| | - Antonia Garrido Frenich
- Research Group "Analytical Chemistry of Contaminants", Department of Chemistry and Physics, Research Centre for Mediterranean Intensive Agrosystems and Agri-Food Biotechnology (CIAIMBITAL), Agrifood Campus of International Excellence (ceiA3), University of Almeria, Almeria, Spain
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Liu H, Zeng Y, Yan J, Huang R, Zhao X, Zheng X, Mo M, Tan S, Tong H. C N H O and mineral element stable isotope ratio analysis for authentication in tea. J Food Compost Anal 2020. [DOI: 10.1016/j.jfca.2020.103513] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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15
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Zhang J, Yang R, Li YC, Peng Y, Wen X, Ni X. Distribution, accumulation, and potential risks of heavy metals in soil and tea leaves from geologically different plantations. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 195:110475. [PMID: 32208212 DOI: 10.1016/j.ecoenv.2020.110475] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 02/08/2020] [Accepted: 03/11/2020] [Indexed: 06/10/2023]
Abstract
Risk assessment regarding heavy metals in tea is crucial to ensure the health of tea customers. However, the effects of geological difference on distribution of heavy metals in soils and their accumulation in tea leaves remain unclear. This study aimed to estimate the impacts of geological difference on distribution of cadmium (Cd), lead (Pb), thallium (Tl), mercury (Hg), arsenic (As), antimony (Sb), chromium (Cr), nickel (Ni), and manganese (Mn) in soils and their accumulation in tea leaves, and further evaluate their health risks. 22 soils and corresponding young tea leaves (YTL) and old tea leaves (OTL), from geologically different plantations, were sampled and analyzed. Results showed that heavy metals concentrations in soils, derived from Permian limestone and Cambrian weakly mineralized dolomite, were obviously greater than those from Silurian clastic rock. The geological difference controlled the distribution of soil heavy metals to a large extent. Contents of Cd, Tl, and Mn in tea leaves mainly depended on their contents in soils. Soil Hg, Pb, As, and Sb contents may not be the only influencing factors for their respective accumulation in tea leaves. More attentions should be paid to soil acidification of tea plantations to ensure the tea quality security. Target hazard quotients (THQ) of Cd, Pb, Tl, Hg, As, Sb, Cr, and Ni and hazard index (HI) via tea intake were below one, indicating no human health risk. The non-mineralized Silurian area was less at risk of heavy metals accumulation in tea leaves than the Cambrian metallogenic belt and the Permian Cd-enriched zone. This study could provide an important basis to understand and mitigate the potential risks of heavy metals in tea.
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Affiliation(s)
- Jian Zhang
- College of Resource and Environmental Engineering, Guizhou University, Guiyang, 550025, China.
| | - Ruidong Yang
- College of Resource and Environmental Engineering, Guizhou University, Guiyang, 550025, China.
| | - Yuncong C Li
- Department of Soil and Water Sciences, Tropical Research and Education Center, IFAS, University of Florida, Homestead, FL, 33031, USA.
| | - Yishu Peng
- College of Tea Science, Guizhou University, Guiyang, 550025, China.
| | - Xuefeng Wen
- College of Agriculture, Guizhou University, Guiyang, 550025, China.
| | - Xinran Ni
- College of Resource and Environmental Engineering, Guizhou University, Guiyang, 550025, China.
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16
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Sun J, Yu R, Yan Y, Hu G, Qiu Q, Jiang S, Cui J, Wang X, Ma C. Isotope tracers for lead and strontium sources in the Tieguanyin tea garden soils and tea leaves. CHEMOSPHERE 2020; 246:125638. [PMID: 31891843 DOI: 10.1016/j.chemosphere.2019.125638] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Revised: 12/06/2019] [Accepted: 12/10/2019] [Indexed: 06/10/2023]
Abstract
The concentrations of Pb & Sr in Tieguanyin tea leaves and soils from 15 tea gardens of Anxi, China, were determined and the sources of Pb & Sr in soil and leaf samples were analysed using isotope tracing technology. The results showed pH in soils had significant correlations to both acid-extractable Pb & Sr in soils and new leaves. The Pb concentration in leaves was significantly lower than that in soils, especially the acid-extractable Pb in soils. The low Bio-concentration Factor (BCF) indicated the bioavailable Pb in soils could not easily be transferred to leaves. The contribution rates of parent material were 61%-100% and 45%-100% for total Pb isotope and acid-extractable Pb isotope in soils, respectively, indicating a low impact of human activity. A sizeable influence of parent material for leaves was also observed, suggesting that Pb may be present in the dust-fall. Although Sr concentrations in leaves were not high, they exceeded that in soils. The high BCF also indicated that tea has a high capacity to accumulate Sr, with the coincidence that Sr87/Sr86 in the acid-extractable isotope in soils were similar to new leaves. A Pb-Sr joint tracer indicated that Sr in old and new leaves may be influenced by parent material and anthropogenic sources, respectively.
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Affiliation(s)
- Jingwei Sun
- Department of Environmental Science and Engineering, Huaqiao University, Xiamen, 361021, China; School of Resources and Environmental Science, Quanzhou Normal University, Quanzhou, 362000, China
| | - Ruilian Yu
- Department of Environmental Science and Engineering, Huaqiao University, Xiamen, 361021, China
| | - Yu Yan
- Department of Environmental Science and Engineering, Huaqiao University, Xiamen, 361021, China.
| | - Gongren Hu
- Department of Environmental Science and Engineering, Huaqiao University, Xiamen, 361021, China.
| | - Qijun Qiu
- Department of Environmental Science and Engineering, Huaqiao University, Xiamen, 361021, China
| | - Songhe Jiang
- Department of Environmental Science and Engineering, Huaqiao University, Xiamen, 361021, China
| | - Jianyong Cui
- Analytical Laboratory of Beijing Research Institute of Uranium Geology, Beijing, 100029, China
| | - Xiaoming Wang
- Analytical Laboratory of Beijing Research Institute of Uranium Geology, Beijing, 100029, China
| | - Chao Ma
- Licheng District Information Center of Environment, Putian, 351100, China
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17
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Pourramezani F, Akrami Mohajeri F, Salmani MH, Dehghani Tafti A, Khalili Sadrabad E. Evaluation of heavy metal concentration in imported black tea in Iran and consumer risk assessments. Food Sci Nutr 2019; 7:4021-4026. [PMID: 31890182 PMCID: PMC6924297 DOI: 10.1002/fsn3.1267] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 08/04/2019] [Accepted: 08/25/2019] [Indexed: 11/15/2022] Open
Abstract
Tea grows in the contaminated soils, absorbs the heavy metals, and enters them into the human food chain. The concentrations of Pb, Cd, Cu, As, and Hg of the imported black tea leaves to Hormozgan Province were evaluated by atomic absorption spectrometer. Then, the Hazard Quotient (HQ) and Hazard Index (HI) levels of heavy metal intakes were calculated to estimate the health hazard for consumers. The Pb, Cd, Cu, As, and Hg concentrations in the Sri Lankan and Indian blank tea were 0.14, 0.017, 11.29, 0.057, 0.0076 mg/kg, and 0.21, 0.02, 14.56, 0.067, 0.01 mg/kg, respectively. It was found that except for As concentration in Indian black tea were higher than Sri Lankan black tea. The HQ and HI levels of all studied metals were less than one, but they were higher in Indian black tea compared with the Sri Lankan black tea. The HI of Indian and Sri Lankan black tea samples were 0.061 and 0.048, respectively, which indicated no significant health hazard for tea consumers. The results showed that the consumption of the studied tea could not have any risk of heavy metal exposure.
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Affiliation(s)
- Fatemeh Pourramezani
- Zoonotic Diseases Research CenterDepartment of Food Hygiene and SafetySchool of Public HealthShahid Sadoughi University of Medical SciencesYazdIran
| | - Fateme Akrami Mohajeri
- Zoonotic Diseases Research CenterDepartment of Food Hygiene and SafetySchool of Public HealthShahid Sadoughi University of Medical SciencesYazdIran
| | - Mohammad Hossein Salmani
- Department of Environmental Health EngineeringSchool of Public HealthShahid Sadoughi University of Medical SciencesYazdIran
| | - Arefe Dehghani Tafti
- Department of BiostatisticsSchool of Public HealthShahid Sadoughi University of Medical SciencesYazdIran
| | - Elham Khalili Sadrabad
- Zoonotic Diseases Research CenterDepartment of Food Hygiene and SafetySchool of Public HealthShahid Sadoughi University of Medical SciencesYazdIran
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Shang F, Wang Y, Wang J, Zhang L, Cheng P, Wang S. Determination of three polycyclic aromatic hydrocarbons in tea using four-way fluorescence data coupled with third-order calibration method. Microchem J 2019. [DOI: 10.1016/j.microc.2019.02.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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19
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Wen B, Li L, Duan Y, Zhang Y, Shen J, Xia M, Wang Y, Fang W, Zhu X. Zn, Ni, Mn, Cr, Pb and Cu in soil-tea ecosystem: The concentrations, spatial relationship and potential control. CHEMOSPHERE 2018; 204:92-100. [PMID: 29653327 DOI: 10.1016/j.chemosphere.2018.04.026] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Revised: 04/03/2018] [Accepted: 04/04/2018] [Indexed: 06/08/2023]
Abstract
Excessive accumulation of heavy metals in tea has certain health risk to the consumers. To discuss the spatial relationship between heavy metals in tea leaves and soil in a county scale, 74 samples of tea leaves and corresponding subsoil (15-30 cm) were collected in the tea plantations of Lishui, Nanjing, China. The total Zn, Ni, Mn, Cr, Pb and Cu in both tea leaves and soil samples, as well as pH value in soil were analyzed. The results of regression showed that the Mn and Cr in tea leaves were increased when the Mn and Cr in soil were at high levels, and higher pH decreased Zn, Ni, Mn and Cu contents in tea leaves. Moreover, distance to village and metal industry had negative impacts on the Mn level in soil. It is necessary to control the pH of soil in tea plantations which are close to villages or metal industries, as well as, to search more appropriate areas, where are far away from villages or metal industries, to plant tea should be taken into consideration. In addition, 17.57% of the samples have higher concentration of Pb than the maximum limits was found in tea plantation of Lishui. Heavy metals (Cr) standards regarding leafy vegetables is used for reference in this study, as there are no maximum levels of contaminants (MLC) in tea. It is significant to construct a targeted standard of heavy metals contents that could applicable throughout the world for reduce the health risks to the consumers.
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Affiliation(s)
- Bo Wen
- College of Horticulture, Nanjing Agricultural University, Nanjing 210095, PR China.
| | - Lei Li
- College of Horticulture, Nanjing Agricultural University, Nanjing 210095, PR China.
| | - Yu Duan
- College of Horticulture, Nanjing Agricultural University, Nanjing 210095, PR China.
| | - Yanyuan Zhang
- College of Economics and Management, Nanjing Agricultural University, Nanjing 210095, PR China.
| | - Jiazhi Shen
- College of Horticulture, Nanjing Agricultural University, Nanjing 210095, PR China.
| | - Min Xia
- College of Public Administration, Nanjing Agricultural University, Nanjing 210095, PR China.
| | - Yuhua Wang
- College of Horticulture, Nanjing Agricultural University, Nanjing 210095, PR China.
| | - Wanping Fang
- College of Horticulture, Nanjing Agricultural University, Nanjing 210095, PR China.
| | - Xujun Zhu
- College of Horticulture, Nanjing Agricultural University, Nanjing 210095, PR China.
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20
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Green Tea Quality Evaluation Based on Its Catechins and Metals Composition in Combination with Chemometric Analysis. Molecules 2018; 23:molecules23071689. [PMID: 29997337 PMCID: PMC6100455 DOI: 10.3390/molecules23071689] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2018] [Revised: 07/07/2018] [Accepted: 07/09/2018] [Indexed: 02/05/2023] Open
Abstract
Green tea infusions are one of the most popular beverages consumed across the world, especially is Asian countries. Green tea quality is primarily based on catechin content, however, the concentration of elements could also significantly influence its biological properties and thus quality and safety. The main purpose of the present study was the evaluation of catechin, antioxidant activity and metal content (K, Na, Ca, Mg, Fe, Mn, Cu, Zn, Cr, Pb, Cd and Ni) in different green tea types cultivated in Japan, Sri Lanka, South Korea, India, China and Japan. The chemical analysis of samples was performed using LC-ESI-Q-TOF-MS for organic constituents and atomic absorption spectrometry (flame and electrothermal) method for inorganic ones. The obtained results were subjected to chemometric elaboration. EGC (213 mg/100 mL of the tea infusion in South Korean Jeoncha) and EGCG (124 mg/100 mL in Japanese Sencha) were the dominant catechins in all green tea samples. Chinese and Indian green tea samples contained the highest concentration of toxic heavy metals, however these values were far below appropriate limitations for green teas. PCA revealed significant similarities between Japanese samples and Korean Jeoncha. In general the latter one was evaluated to have the best quality based on the investigated parameters.
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21
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Peng CY, Zhu XH, Hou RY, Ge GF, Hua RM, Wan XC, Cai HM. Aluminum and Heavy Metal Accumulation in Tea Leaves: An Interplay of Environmental and Plant Factors and an Assessment of Exposure Risks to Consumers. J Food Sci 2018; 83:1165-1172. [PMID: 29577290 DOI: 10.1111/1750-3841.14093] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2017] [Revised: 12/30/2017] [Accepted: 02/02/2018] [Indexed: 01/17/2023]
Abstract
Environmental and plant factors (soil condition, variety, season, and maturity) and exposure risks of aluminum (Al), manganese (Mn), lead (Pb), cadmium (Cd), and copper (Cu) in tea leaves were investigated. The concentrations of these metals in tea leaves could not be predicted by their total concentrations in the soil. During any one season, there were differences in Al, Mn, and Cd levels between tea varieties. Seasonally, autumn tea and/or summer tea had far higher levels of Al, Mn, Pb, and Cd than did spring tea. Tea leaf maturity positively correlated with the concentrations of Al, Mn, Pb, and Cd, but negatively with Cu. The calculated average daily intake doses (mg/ [kg•d]) for these metal elements were 0.14 (Al), 0.11 (Mn), 2.70 × 10-3 (Cu), 2.80 × 10-4 (Pb), and 2.88 × 10-6 (Cd). The hazard quotient values of each metal were all significantly lower than risk level (=1), suggesting that, for the general population, consumption of tea does not result in the intake of excessive amounts of Al, Mn, Pb, Cd, or Cu. This study identified the factors that can be monitored in the field to decrease consumer exposure to Al and Mn through tea consumption. PRACTICAL APPLICATION Environmental and plant factors influence aluminum and heavy metal accumulation in tea leaves. Consumers of tea are not ingesting excessive Al, Mn, Pb, Cd, or Cu. Trackable factors were identified to manage exposure levels.
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Affiliation(s)
- Chuan-Yi Peng
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural Univ., Hefei, 230036, Anhui, P.R. China
| | - Xiao-Hui Zhu
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural Univ., Hefei, 230036, Anhui, P.R. China
| | - Ru-Yan Hou
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural Univ., Hefei, 230036, Anhui, P.R. China
| | - Gao-Fei Ge
- Biotechnology Center of Anhui Agricultural Univ., Anhui, Hefei, 230036, P.R. China
| | - Ri-Mao Hua
- School of Resource & Environment of Anhui Agricultural Univ., Key Lab. of Agri-food Safety of Anhui Province, Hefei, 230036, P.R. China
| | - Xiao-Chun Wan
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural Univ., Hefei, 230036, Anhui, P.R. China
| | - Hui-Mei Cai
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural Univ., Hefei, 230036, Anhui, P.R. China
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Zhao H, Yu C, Li M. Effects of geographical origin, variety, season and their interactions on minerals in tea for traceability. J Food Compost Anal 2017. [DOI: 10.1016/j.jfca.2017.07.030] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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23
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Relationship between multi-element composition in tea leaves and in provenance soils for geographical traceability. Food Control 2017. [DOI: 10.1016/j.foodcont.2017.01.006] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Brzezicha-Cirocka J, Grembecka M, Ciesielski T, Flaten TP, Szefer P. Evaluation of Macro- and Microelement Levels in Black Tea in View of Its Geographical Origin. Biol Trace Elem Res 2017; 176:429-441. [PMID: 27637916 PMCID: PMC5344953 DOI: 10.1007/s12011-016-0849-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Accepted: 09/07/2016] [Indexed: 12/02/2022]
Abstract
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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Affiliation(s)
- Justyna Brzezicha-Cirocka
- Department of Food Sciences, Medical University of Gdańsk, Al. Gen. J. Hallera 107, 80-416, Gdańsk, PL, Poland
| | - Małgorzata Grembecka
- Department of Food Sciences, Medical University of Gdańsk, Al. Gen. J. Hallera 107, 80-416, Gdańsk, PL, Poland
| | - Tomasz Ciesielski
- Department of Biology, Norwegian University of Science and Technology, NO-7491, Trondheim, Norway
| | - Trond Peder Flaten
- Department of Chemistry, Norwegian University of Science and Technology, NO-7491, Trondheim, Norway
| | - Piotr Szefer
- Department of Food Sciences, Medical University of Gdańsk, Al. Gen. J. Hallera 107, 80-416, Gdańsk, PL, Poland.
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Rashid MH, Fardous Z, Chowdhury MAZ, Alam MK, Bari ML, Moniruzzaman M, Gan SH. Determination of heavy metals in the soils of tea plantations and in fresh and processed tea leaves: an evaluation of six digestion methods. Chem Cent J 2016; 10:7. [PMID: 26900397 PMCID: PMC4759960 DOI: 10.1186/s13065-016-0154-3] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Accepted: 02/05/2016] [Indexed: 12/07/2022] Open
Abstract
Background The 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. Methods Graphite 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. Results The 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. Conclusion Overall, the present study gives current insights into the heavy metal levels both in soils and teas commonly consumed in Bangladesh.
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Affiliation(s)
- Md Harunur Rashid
- Agrochemical and Environmental Research Division, Institute of Food and Radiation Biology, Bangladesh Atomic Energy Research Establishment, Savar, Dhaka, 1349 Bangladesh
| | - Zeenath Fardous
- Food Analysis and Research Laboratory, Center for Advanced Research in Sciences, University of Dhaka, Dhaka, Bangladesh
| | - M Alamgir Zaman Chowdhury
- Agrochemical and Environmental Research Division, Institute of Food and Radiation Biology, Bangladesh Atomic Energy Research Establishment, Savar, Dhaka, 1349 Bangladesh
| | - Md Khorshed Alam
- Agrochemical and Environmental Research Division, Institute of Food and Radiation Biology, Bangladesh Atomic Energy Research Establishment, Savar, Dhaka, 1349 Bangladesh
| | - Md Latiful Bari
- Food Analysis and Research Laboratory, Center for Advanced Research in Sciences, University of Dhaka, Dhaka, Bangladesh
| | - Mohammed Moniruzzaman
- Department of Pharmacology, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, 16150 Kota Bharu, Kelantan Malaysia
| | - Siew Hua Gan
- Human Genome Centre, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, 16150 Kota Bharu, Kelantan Malaysia
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