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Fouad OA, Wahsh MM, Mohamed GG, MI El Desssouky M, Mostafa MR. Fabrication and characterization of mullite nano-ceramic materials for use in carbon paste ion selective electrode to estimate carcinogenic Cd (II) ion in real and human samples. Microchem J 2023. [DOI: 10.1016/j.microc.2023.108623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/15/2023]
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Benavides LF, Marín JD, Rosales C, García J. Development and Validation of a Method for the Analysis of Zinc Oxide in Cosmetic Matrices by Flame Atomic Absorption Spectroscopy. JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY 2021; 2021:8840723. [PMID: 34136306 PMCID: PMC8179769 DOI: 10.1155/2021/8840723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Accepted: 05/22/2021] [Indexed: 06/12/2023]
Abstract
A fast and simple method for the extraction and Flame Atomic Absorption Spectroscopy (FAAS) quantification of ZnO in different cosmetic matrices, including lipsticks, water-in-oil foundations, and oil-in-water creams, was developed and validated, according to the International Council for Harmonization of Technical Requirements for Pharmaceuticals for Human Use (ICH) and the United States Pharmacopeial Convention guidelines. The sample preparation consisted of an ultrasound-assisted ethanolic extraction of ZnO followed by digestion with 1 M nitric acid (HNO3). Samples were analyzed by Flame Atomic Absorption Spectroscopy (FAAS). Specificity, linearity, the limit of detection (LOD), the limit of quantification (LOQ), sensitivity, precision, and accuracy parameters were studied. The robustness of the method was evaluated with a five-variable Youden-Steiner model. The method was specific for ZnO, and the extraction procedure did not affect the stability of the signal compared to the background. The method was linear in the range 0.2-1.0 mg/L with LOD/LOQ values equal to 0.0156 (mg·L-1)/0.0473 (mg·L-1), 0.0098 (mg·L-1)/0.0297 (mg·L-1), 0.0113 (mg·L-1)/0.0341 (mg·L-1), and 0.0131 (mg·L-1)/0.0397 (mg·L-1), respectively, for raw material, lipstick, liquid foundation, and emulsion matrices. Regarding precision, the %RSD values were below 3.0% for repeatability and intermediate precision. Global reproducibility RSD was below 8.0% for all matrices. The percentage of recovery was not statistically different from 100% in all cases. The final concentration was found to be a critical variable for all matrices except for the raw material. The variables associated with the extraction step (ethanol volume, bath temperature, and extraction time) were critical in the extraction of liquid foundations and cream emulsions. The method reduces the number and concentration of mineral acids spent on the digestion of ZnO, and its application is extendable to raw materials. This development is an adequate tool for routine analysis and cosmetic quality control of chemically different products that contain ZnO as ultraviolet radiation (UV) filter, to guarantee regulatory compliance and ensure the safety and efficacy of products delivered to consumers.
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Affiliation(s)
| | - Juan D. Marín
- Belcorp Research and Development, Tocancipá 251017, Colombia
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Hamza A, Bahaffi S, Abduljabbar T, El-Shahawi M. Trace determination and speciation of elements in green tea. RESULTS IN CHEMISTRY 2021. [DOI: 10.1016/j.rechem.2020.100081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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4
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Barman T, Barooah AK, Goswami BC, Sharma N, Panja S, Khare P, Karak T. Contents of Chromium and Arsenic in Tea (Camellia sinensis L.): Extent of Transfer into Tea Infusion and Health Consequence. Biol Trace Elem Res 2020; 196:318-329. [PMID: 31506911 DOI: 10.1007/s12011-019-01889-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Accepted: 02/07/2019] [Indexed: 10/26/2022]
Abstract
Tea (Camellia sinensis L.) is the most popular beverage in the world after water. Due to acidophilic nature of tea plant, it has inherent tendency to uptake metals/metalloids including the toxic ones from the soil which is of great concern worldwide. In this study, level of chromium (Cr) and arsenic (As) were assessed in four hundred ninety-seven (497) black tea samples collected from six tea growing regions of Assam and North Bengal, India. The average concentration of Cr and As in the tested black tea samples was 10.33 and 0.11 μg g-1, respectively. Since tea is consumed as a beverage, transfer of Cr and As from black tea to its hot water extract (also known as tea infusion) was also accessed. The amount of Cr and As determined in the tea infusion was much less (< 0.20 to 1.38 μg g-1 for Cr and < 3.60 to 34.79 μg kg-1 for As) than those in the black teas with the transfer rate up to 5.96% and 8.53%, respectively. The present study showed that values of hazard quotient were well below one suggesting that intake of Cr and As from consumption of five cups of tea equivalent to 10 g black tea would not impose any health hazard.
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Affiliation(s)
- Tupu Barman
- Analytical Services Department, Tocklai Tea Research Institute, Jorhat, Assam, 785008, India
| | - A K Barooah
- Analytical Services Department, Tocklai Tea Research Institute, Jorhat, Assam, 785008, India
| | - B C Goswami
- Cotton University, Guwahati, Assam, 781001, India
| | - Nipom Sharma
- Analytical Services Department, Tocklai Tea Research Institute, Jorhat, Assam, 785008, India
| | - Saumik Panja
- Department of Civil, Environmental and Ocean Engineering, Stevens Institute of Technology, 1 Castle Point Terrace, Hoboken, NJ, 07030, USA
| | - Puja Khare
- Agronomy-Soil Division, CSIR-Central Institute of Medicinal and Aromatic Plants, P.O.-CIMAP, Near Kukrail Picnic Spot, Lucknow, 226 015, India
| | - Tanmoy Karak
- Department of Civil, Environmental and Ocean Engineering, Stevens Institute of Technology, 1 Castle Point Terrace, Hoboken, NJ, 07030, USA.
- Upper Assam Advisory Centre, Tea Research Association, Dikom, Assam, 786 101, India.
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Mohamed H, Haris PI, Brima EI. Estimated dietary intake of essential elements from four selected staple foods in Najran City, Saudi Arabia. BMC Chem 2019; 13:73. [PMID: 31384820 PMCID: PMC6661740 DOI: 10.1186/s13065-019-0588-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Accepted: 05/07/2019] [Indexed: 12/30/2022] Open
Abstract
The estimated dietary intake (EDI) of essential elements selenium (Se), zinc (Zn), manganese (Mn) and copper (Cu) has not been previously investigated for Najran city, Saudi Arabia. This type of information can be valuable for protecting public health. The aim of this study was to estimate the EDI of these elements. A food frequency questionnaire (FFQ) was completed by the study participants (n = 80) to obtain dietary intake of selected staple foods (rice, wheat, meat and chicken). The concentrations of Se, Zn, Mn and Cu in these staple foods were determined using inductively coupled plasma-mass spectrometry (ICP-MS). The ranges of concentrations (mg/kg, wet weight) were as follows: Se (0.07–0.24), Zn (3.91–20.89), Mn (0.63–14.69) and Cu (0.69–2.41). The calculated ranges of EDIs (mg/kg bw/day) for the essential elements were as follows: Se 9.55 × 10−5–5.75 × 10−4, Zn 1.33 × 10−2–5.83 × 10−2, Mn 1.49 × 10−3–3.31 × 10−2, Cu 1.65 × 10−3–5.42 × 10−3. The highest EDI for Cu and Mn came from wheat. In the case of Se and Zn, the foods that contributed the highest EDI were chicken and meat, respectively. The lowest EDIs were found for Se in wheat, Zn in rice and both Mn and Cu in chicken. The percentages (%) of provisional maximum tolerable daily intake (PMTDI) for Se, Zn, Mn and Cu were 13%, 11%, 14% and 3.4%, respectively when contributions from all the four classes of foods were combined. The percentage of the recommended daily allowance (RDA) derived from these foods were 80%, 20%, 17% and 5.6% for Se, Zn, Mn and Cu were, respectively. This raises the possibility of Cu deficiency in the Najran population. However, a total diet study and human biomonitoring study is needed in the future to fully assess if people in Najran city are at risk of deficiency or excessive exposure to trace elements.
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Affiliation(s)
- Hatem Mohamed
- 1Faculty of Health and Life Science, De Montfort University, Leicester, LE1 9BH UK
| | - Parvez I Haris
- 1Faculty of Health and Life Science, De Montfort University, Leicester, LE1 9BH UK
| | - Eid I Brima
- 2Department of Chemistry, College of Science, King Khalid University, Abha, 61413 Saudi Arabia
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Kazi TG, Afridi HI, Bhatti M, Akhtar A. A rapid ultrasonic energy assisted preconcentration method for simultaneous extraction of lead and cadmium in various cosmetic brands using deep eutectic solvent: A multivariate study. ULTRASONICS SONOCHEMISTRY 2019; 51:40-48. [PMID: 30514484 DOI: 10.1016/j.ultsonch.2018.10.016] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 09/13/2018] [Accepted: 10/12/2018] [Indexed: 06/09/2023]
Abstract
An innovative ultrasonic assisted microextraction method using a deep eutectic solvent for entrapping the organ metallic complexes was developed to pre-concentrate the trace quantities of cadmium (Cd) and lead (Pb) in lipsticks and eye shadows of different brands prior to flame atomic absorption spectrometry analysis. A deep eutectic solvent (DES) was used in this study, prepared by mixing metal salt (ZnCl2) and hydrogen bond donors such as (acetamide) in different ratio. The different branded cosmetic items, lipstick and eye shadows, obtained from local market and subjected to acid digestion prior to application of proposed ultrasonic assisted microextraction method based on deep eutectic solvent (UAµE-DES) with the aid of mechanical and ultrasound energies. Ammonium pyrrolidine dithiocarbamate was used as a ligand to made hydrophobic complexes of Cd and Pb, entrapped in DES in the presence of aprotic solvent. The seven variables, mixing ratio of ZnCl2 and Acetamide, DES volume, Ultrasound and Conventional shaking time, pH, tetrahydrofuran and complexing reagent volume were optimized by multivariate approach for the optimum recovery of Cd and Pb from real cosmetic items. The resulted data indicates that ultrasound energy assisted extraction time, volume of DES and pH were most significant variables. The precision and validity of developed procedure were checked by the spiked known certified standards in real samples. The resulted data indicated that the lipsticks have different glittering colors contains high contents of Pb and Cd, whereas dark colors of eye shadows contain high level of both elements.
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Affiliation(s)
- Tasneem Gul Kazi
- National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, Pakistan.
| | - Hassan Imran Afridi
- National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, Pakistan.
| | - Murk Bhatti
- National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, Pakistan.
| | - Asma Akhtar
- National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, Pakistan.
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Hashemi SH, Kaykhaii M, Jamali Keikha A, Sajjadi Z, Mirmoghaddam M. Application of response surface methodology for silver nanoparticle stir bar sorptive extraction of heavy metals from drinking water samples: a Box–Behnken design. Analyst 2019; 144:3525-3532. [DOI: 10.1039/c9an00165d] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Silver nanoparticles were coated on a glass stir bar and used for the extraction of heavy metals from water samples after their complexation with ligand PAN, followed by their HPLC determination.
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Affiliation(s)
- Sayyed Hossein Hashemi
- Department of Marine Chemistry
- Faculty of Marine Science
- Chabahar Maritime University
- Chabahar
- Iran
| | - Massoud Kaykhaii
- Department of Chemistry
- Faculty of Sciences
- University of Sistan and Baluchestan
- Zahedan
- Iran
| | - Ahmad Jamali Keikha
- Department of Mechanical Engineering
- Faculty of Marine Engineering
- Chabahar Maritime University
- Chabahar
- Iran
| | - Zahra Sajjadi
- Department of Marine Chemistry
- Faculty of Marine Science
- Chabahar Maritime University
- Chabahar
- Iran
| | - Majid Mirmoghaddam
- Department of Chemistry
- Faculty of Sciences
- University of Sistan and Baluchestan
- Zahedan
- Iran
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Zhang L, Zhang J, Chen L, Liu T, Ma G, Liu X. Influence of manufacturing process on the contents of iron, copper, chromium, nickel and manganese elements in Crush, Tear and Curl black tea, their transfer rates and health risk assessment. Food Control 2018. [DOI: 10.1016/j.foodcont.2018.01.030] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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9
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Daşbaşı T, Soykan C, Çankaya N, Ülgen A. Determination of some trace metals with a new synthesized polymer resin by FAAS in various tea and herbal plants samples. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2018. [DOI: 10.1080/10601325.2018.1470464] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Affiliation(s)
- Teslima Daşbaşı
- Cumhuriyet University, Department of Chemistry and Chemical Processing Technologies, Gemerek Vocational School, Sivas, Turkey
| | - Cengiz Soykan
- Uşak University, Department of Material Science and Nanotechnology, Faculty of Engineering, Uşak, Turkey
| | - Nevin Çankaya
- Uşak University, Department of Chemistry, Faculty of Sciences and Arts, Uşak, Turkey
| | - Ahmet Ülgen
- Erciyes University, Department of Chemistry, Faculty of Sciences, Kayseri, Turkey
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Karak T, Kutu FR, Nath JR, Sonar I, Paul RK, Boruah RK, Sanyal S, Sabhapondit S, Dutta AK. Micronutrients (B, Co, Cu, Fe, Mn, Mo, and Zn) content in made tea (Camellia sinensis L.) and tea infusion with health prospect: A critical review. Crit Rev Food Sci Nutr 2018; 57:2996-3034. [PMID: 26478953 DOI: 10.1080/10408398.2015.1083534] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Tea (Camellia sinensis L.) is a perennial acidophilic crop, and known to be a nonalcoholic stimulating beverage that is most widely consumed after water. The aim of this review paper is to provide a detailed documentation of selected micronutrient contents, viz. boron (B), cobalt (Co), copper (Cu), iron (Fe), manganese (Mn), molybdenum (Mo), and zinc (Zn) in made tea and tea infusion. Available data from the literature were used to calculate human health aspect associated with the consumption of tea infusion. A wide range of micronutrients reported in both made tea and tea infusion could be the major sources of micronutrients for human. The content of B, Co, Cu, Fe, Mn, Mo, and Zn in made tea are ranged from 3.04 to 58.44 μg g-1, below detectable limit (BDL) to 122.4 μg g-1, BDL to 602 μg g-1, 0.275 to 13,040 μg g-1, 0.004 to 15,866 μg g-1, 0.04 to 570.80 μg g-1 and 0.01 to 1120 μg g-1, respectively. Only 3.2 μg L-1 to 7.25 mg L-1, 0.01 μg L-1 to 7 mg L-1, 3.80 μg L-1 to 6.13 mg L-1, 135.59 μg L-1 -11.05 mg L-1, 0.05 μg L-1 to 1980.34 mg L-1, 0.012 to 3.78 μg L-1, and 1.12 μg L-1 to 2.32 μg L-1 of B, Co, Cu, Fe, Mn, Mo, and Zn, respectively, are found in tea infusion which are lower than the prescribed limit of micronutrients in drinking water by World Health Organization. Furthermore, micronutrient contents in tea infusion depend on infusion procedure as well as on the instrument used for analysis. The proportion of micronutrients found in different tea types are 1.0-88.9% for B, 10-60% for Co, 2.0-97.8% for Cu, 67.8-89.9% for Fe, 71.0-87.4% for Mn, 13.3-34% for Mo, and 34.9-83% for Zn. From the results, it can also be concluded that consumption of three cups of tea infusion per day does not have any adverse effect on human health with respect to the referred micronutrients rather got beneficial effects to human.
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Affiliation(s)
- Tanmoy Karak
- a Upper Assam Advisory Centre , Tea Research Association , Assam , India
| | - Funso Raphael Kutu
- b Department of Crop Science, School of Agricultural Sciences , North West University, Mafikeng Campus , Mmabatho , South Africa
| | - Jyoti Rani Nath
- a Upper Assam Advisory Centre , Tea Research Association , Assam , India
| | - Indira Sonar
- a Upper Assam Advisory Centre , Tea Research Association , Assam , India
| | - Ranjit Kumar Paul
- c Indian Agricultural Statistics Research Institute , New Delhi , India
| | | | - Sandip Sanyal
- d Department of Tea Processing and Manufacturing Advisory , Tea Research Association, Tocklai Tea Research Institute , Jorhat , Assam , India
| | - Santanu Sabhapondit
- e Department of Biochemistry , Tea Research Association, Tocklai Tea Research Institute , Jorhat , Assam , India
| | - Amrit Kumar Dutta
- a Upper Assam Advisory Centre , Tea Research Association , Assam , India
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Anderson GL, Garnick L, Fung MS, Gaffney SH. A pilot study to assess lead exposure from routine consumption of coffee and tea from ceramic mugs: comparison to California Safe Harbor Levels. INTERNATIONAL JOURNAL OF FOOD CONTAMINATION 2017. [DOI: 10.1186/s40550-017-0049-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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12
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Brzezicha-Cirocka J, Grembecka M, Szefer P. Monitoring of essential and heavy metals in green tea from different geographical origins. ENVIRONMENTAL MONITORING AND ASSESSMENT 2016; 188:183. [PMID: 26899031 PMCID: PMC4762913 DOI: 10.1007/s10661-016-5157-y] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Accepted: 02/03/2016] [Indexed: 05/04/2023]
Abstract
The present study measured the concentrations of toxic metals (Cd, Pb) and other elements (Ca, K, Mg, Na, P, Mn, Fe, Zn, Cu, Co, Cr, Ni) in tea leaves and their infusions. The total metal contents were determined by atomic absorption spectrometry. Phosphorus concentration was determined using an ultraviolet-visible spectrophotometer. Assessment of the mineral composition enabled determination of the leaching percentage and the risk of exceeding provisional tolerable weekly intake for Cd through daily tea consumption. The concentrations of bioelements were analyzed based on the recommended daily intake values for each. According to recently established standards, green tea was found to be a rich source of Mn. The average Pb and Cd levels in a 200-mL beverage were 0.002 and 0.003 mg, respectively. Indian teas had the highest percentage of Cd leaching (43.8%) and Chinese tea had the lowest (9.41%). Multivariate analysis techniques such as factor analysis and cluster analysis were used to differentiate samples according to geographical origin (China, India, or Japan). Potassium, P, Mn, Fe, Cu, Co, and Cd were effective descriptors for the identification of tea samples from China, India, and Japan.
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Affiliation(s)
- Justyna Brzezicha-Cirocka
- Department of Food Sciences, Medical University of Gdansk, Al. Gen. J. Hallera 107, Gdansk, 80-416, Poland
| | - Małgorzata Grembecka
- Department of Food Sciences, Medical University of Gdansk, Al. Gen. J. Hallera 107, Gdansk, 80-416, Poland.
| | - Piotr Szefer
- Department of Food Sciences, Medical University of Gdansk, Al. Gen. J. Hallera 107, Gdansk, 80-416, Poland
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Amorim FAC, Costa VC, Guedes WN, de Sá IP, dos Santos MC, da Silva EGP, Lima DDC. Multivariate Optimization of Method of Slurry Sampling for Determination of Iron and Zinc in Starch Samples by Flame Atomic Absorption Spectrometry. FOOD ANAL METHOD 2015. [DOI: 10.1007/s12161-015-0296-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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14
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Zhong WS, Ren T, Zhao LJ. Determination of Pb (Lead), Cd (Cadmium), Cr (Chromium), Cu (Copper), and Ni (Nickel) in Chinese tea with high-resolution continuum source graphite furnace atomic absorption spectrometry. J Food Drug Anal 2015; 24:46-55. [PMID: 28911408 PMCID: PMC9345429 DOI: 10.1016/j.jfda.2015.04.010] [Citation(s) in RCA: 116] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2014] [Revised: 03/16/2015] [Accepted: 05/05/2015] [Indexed: 11/30/2022] Open
Abstract
The contents of lead, cadmium, chromium, copper, and nickel were determined in 25 tea samples from China, including green, yellow, white, oolong, black, Pu’er, and jasmine tea products, using high-resolution continuum source graphite furnace atomic absorption spectrometry. The methods used for sample preparation, digestion, and quantificational analysis were established, generating satisfactory analytical precisions (represented by relative standard deviations ranging from 0.6% to 2.5%) and recoveries (98.91–101.32%). The lead contents in tea leaves were 0.48–10.57 mg/kg, and 80% of these values were below the maximum values stated by the guidelines in China. The contents of cadmium and chromium ranged from 0.01 mg/kg to 0.39 mg/kg and from 0.27 mg/kg to 2.45 mg/kg, respectively, remaining in compliance with the limits stipulated by China’s Ministry of Agriculture. The copper contents were 7.73–63.71 mg/kg; only 64% of these values complied with the standards stipulated by the Ministry of Agriculture. The nickel contents ranged from 2.70 mg/kg to 13.41 mg/kg. Consequently, more attention must be paid to the risks of heavy metal contamination in tea. The quantitative method established in this work lays a foundation for preventing heavy metal toxicity in human from drinking tea and will help establish regulations to control the contents of heavy metals in tea.
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Affiliation(s)
- Wen-Si Zhong
- The Experimental High School Attached to Beijing Normal University, Beijing, China
| | - Ting Ren
- Beijing Key Laboratory of Environmental and Viral Oncology, College of Life Science and Bioengineering, Beijing University of Technology, Beijing, China
| | - Li-Jiao Zhao
- Beijing Key Laboratory of Environmental and Viral Oncology, College of Life Science and Bioengineering, Beijing University of Technology, Beijing, China.
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15
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Determination of essential and non-essential elements in green and black teas by FAAS and ICP OES simplified – multivariate classification of different tea products. Microchem J 2015. [DOI: 10.1016/j.microc.2015.02.009] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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Yilmaz E, Soylak M. Ultrasound assisted-deep eutectic solvent extraction of iron from sheep, bovine and chicken liver samples11This study is a part of PhD thesis of Erkan Yilmaz. Talanta 2015; 136:170-3. [DOI: 10.1016/j.talanta.2014.12.034] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2014] [Revised: 12/13/2014] [Accepted: 12/21/2014] [Indexed: 10/24/2022]
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17
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Chen Q, Zhang D, Pan W, Ouyang Q, Li H, Urmila K, Zhao J. Recent developments of green analytical techniques in analysis of tea's quality and nutrition. Trends Food Sci Technol 2015. [DOI: 10.1016/j.tifs.2015.01.009] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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18
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Concentrations and solubility of selected trace metals in leaf and bagged black teas commercialized in Poland. J Food Drug Anal 2015; 23:486-492. [PMID: 28911707 PMCID: PMC9351806 DOI: 10.1016/j.jfda.2014.08.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2014] [Revised: 08/16/2014] [Accepted: 08/19/2014] [Indexed: 12/24/2022] Open
Abstract
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.
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Karak T, Paul RK, Sonar I, Sanyal S, Ahmed KZ, Boruah RK, Das DK, Dutta AK. Chromium in soil and tea ( Camellia sinensis L.) infusion: Does soil amendment with municipal solid waste compost make sense? Food Res Int 2014; 64:114-124. [DOI: 10.1016/j.foodres.2014.06.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Revised: 05/29/2014] [Accepted: 06/04/2014] [Indexed: 11/26/2022]
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20
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Paz-Rodríguez B, Domínguez-González MR, Aboal-Somoza M, Bermejo-Barrera P. Application of High Resolution-Continuum Source Flame Atomic Absorption Spectrometry (HR-CS FAAS): determination of trace elements in tea and tisanes. Food Chem 2014; 170:492-500. [PMID: 25306375 DOI: 10.1016/j.foodchem.2014.08.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Revised: 07/29/2014] [Accepted: 08/02/2014] [Indexed: 10/24/2022]
Abstract
A new application of HR-CS FAAS (High Resolution-Continuum Source Flame Atomic Absorption Spectrometry) has been developed for the determination of several trace elements (Ca, Co, Cu, Fe, Mn, Ni, Na and Zn) in infusions made from tea, rooibos and tea with seaweed samples. The proposed methods are fast, inexpensive and show good performances: the mean analytical recovery was approximately 100%. The mean limit of detection was 29.4 μg/l, and the mean limit of quantification was 98.0 μg/l (both limits refer to the brewed samples). Due to the matrix effect observed, the standard addition method had to be applied. Preliminary classification (based on metal contents) using chemometric techniques such as PCA (Principal Component Analysis) and CA (Cluster Analysis), was successful for infusions made from rooibos and tea with seaweed, but inconclusive for black and green teas.
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Affiliation(s)
- Beatriz Paz-Rodríguez
- University of Santiago de Compostela, Department of Analytical Chemistry, Nutrition and Bromatology, School of Sciences, 15782 Lugo, Spain
| | - María Raquel Domínguez-González
- University of Santiago de Compostela, Department of Analytical Chemistry, Nutrition and Bromatology, School of Sciences, 15782 Lugo, Spain
| | - Manuel Aboal-Somoza
- University of Santiago de Compostela, Department of Analytical Chemistry, Nutrition and Bromatology, School of Sciences, 15782 Lugo, Spain.
| | - Pilar Bermejo-Barrera
- University of Santiago de Compostela, Department of Analytical Chemistry, Nutrition and Bromatology, School of Chemistry, 1782 Santiago de Compostela (La Coruña), Spain
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Santos LFP, Trigueiro INS, Lemos VA, da Nóbrega Furtunato DM, Cardoso RDCV. Assessment of cadmium and lead in commercially important seafood from São Francisco do Conde, Bahia, Brazil. Food Control 2013. [DOI: 10.1016/j.foodcont.2013.02.024] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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