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Wang J, Lu X, Wang H, Zhong Y, Dai Z, Wei T. Target-induced reconstruction of Ru(bpy) 32+-loaded gold nanocage for one-step highly sensitive detection of Hg 2. Talanta 2025; 292:127955. [PMID: 40112592 DOI: 10.1016/j.talanta.2025.127955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2025] [Revised: 03/01/2025] [Accepted: 03/15/2025] [Indexed: 03/22/2025]
Abstract
In this work, Ru(bpy)32+-loaded gold nanocage (AuNCs) (Ru-AuNCs) was prepared and found to display a distinct property of electrochemiluminescence (ECL) enhancement under mercury ions (Hg2+) interaction. Based on this, we designed a screen-printed bipolar electrode-ECL (SPBPE-ECL) sensing platform by coupling with the thymine-Hg2+-thymine (T-Hg2+-T) binding pattern for one-step highly sensitive detection of Hg2+. This ECL sensor showed a wide linear detection range (0.75 - 850 μg L-1) and low detection limit (0.1290 μg L-1) toward Hg2+, with a one-step detection procedure and disposable feature, displaying potential applicability in the point-of-care-testing (POCT) of Hg2+ in the environment. In addition, the Hg2+-mediated ECL signal enhancement mechanism of Ru-AuNCs was also investigated. It was confirmed that Hg2+ interaction etched the cage structure of Ru-AuNCs, which sped up the release of more Ru(bpy)32+ around the sensing electrode. Furthermore, Au-Hg alloy structure was formed on the surface of Ru-AuNCs, which also improved the ECL signal. This target-induced in-situ sensing material surface reconstruction strategy would provide a better design concept for the construction of ECL POCT sensor.
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Affiliation(s)
- Jin Wang
- Collaborative Innovation Center of Biomedical Functional Materials of Jiangsu Province, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, PR China
| | - Xinyu Lu
- Collaborative Innovation Center of Biomedical Functional Materials of Jiangsu Province, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, PR China
| | - Huafeng Wang
- School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, PR China
| | - Yuan Zhong
- Collaborative Innovation Center of Biomedical Functional Materials of Jiangsu Province, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, PR China
| | - Zhihui Dai
- Collaborative Innovation Center of Biomedical Functional Materials of Jiangsu Province, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, PR China; State Key Laboratory of Analytical Chemistry for Life Science, Nanjing University, Nanjing 210023, PR China; School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, PR China
| | - Tianxiang Wei
- School of Environment, Nanjing Normal University, Nanjing 210023, PR China; State Key Laboratory of Analytical Chemistry for Life Science, Nanjing University, Nanjing 210023, PR China.
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Alwael H, Alzahrani KA, Abduljabbar TN, Alharthi AS, Alshareef FM, Bahaidarah EA, Alkhraije AA, El-Shahawi MS. An Efficient Fluorescent Chemosensing Probe for Total Determination and Speciation of Ultra-Trace Levels of Mercury (II) Species in Water. J Fluoresc 2024:10.1007/s10895-024-03999-w. [PMID: 39485654 DOI: 10.1007/s10895-024-03999-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2024] [Accepted: 10/07/2024] [Indexed: 11/03/2024]
Abstract
The current study reports a novel fluorescent chemosensor based on the tagging agent 4,5,6,7-tetrachloro-2',4',5',7'-tetraiodofluorescein (Rose Bengal, RB) for detection of trace levels of Hg2+in environmental water. The established probe has been based upon liquid-liquid extraction (LLE) of the developed ternary complex ion associate {[Hg (bpy)2]2+.[RB]2-} of Hg2+ -2,2- bipyridyl complex [Hg (bpy)2]2+ and RB at pH 9.0 onto chloroform and measuring the resulting fluorescence enhancement signal intensity at λex/em = 570/ (580-600) nm. The limits of detection (LOD) and quantification (LOQ) of for Hg2+ was calculated to be 6.06 and 20 nM with a linear dynamic range (LDR) of 0.02-20µM, respectively. The stability constant, stoichiometry, chemical equilibria, and the thermodynamic parameters (ΔH, ΔS, and ΔG) of the developed ion associate were evaluated and assigned. Student's t and F tests at 95% confidence were fruitfully used for validation of the proposed methodology for Hg2+ detection in water samples with the aid of inductively coupled plasma-optical emission spectrometry (ICP-OES). The established strategy was successfully applied for detection of trace levels of Hg2+ in water samples with acceptable results. The proposed probe was satisfactorily applied for total determination and speciation of Hg in various water samples. Integrating the functional chelating agent onto associate formation to improve the selectivity and sensing properties of the LLE combining sensing probe towards target analyte in water represent the main interest.
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Affiliation(s)
- H Alwael
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah, 21589, Saudi Arabia
| | - K A Alzahrani
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah, 21589, Saudi Arabia
- Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| | - T N Abduljabbar
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah, 21589, Saudi Arabia
| | - A S Alharthi
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah, 21589, Saudi Arabia
- Department of Chemistry, Faculty of Applied Sciences, Umm AL-Qura University, Makkah, Saudi Arabia
| | - F M Alshareef
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah, 21589, Saudi Arabia
| | - E A Bahaidarah
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah, 21589, Saudi Arabia
| | - A A Alkhraije
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah, 21589, Saudi Arabia
- Department of Chemistry, Al-Leith University College, Umm AL-Qura University, Al Leith Makkah, Al-Leith, Saudi Arabia
| | - M S El-Shahawi
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah, 21589, Saudi Arabia.
- Department of Chemistry, Faculty of Science, Damietta University, New Damietta, Damietta, Egypt.
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Atasoy M, Yildiz D, Kula İ, Vaizoğullar Aİ. Determination and speciation of methyl mercury and total mercury in fish tissue samples by gold-coated W-coil atom trap cold vapor atomic absorption spectrometry. Food Chem 2023; 401:134152. [DOI: 10.1016/j.foodchem.2022.134152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Revised: 09/02/2022] [Accepted: 09/04/2022] [Indexed: 10/14/2022]
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4
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Alula MT, Madingwane ML, Yan H, Lemmens P, Zhe L, Etzkorn M. Biosynthesis of bifunctional silver nanoparticles for catalytic reduction of organic pollutants and optical monitoring of mercury (II) ions using their oxidase-mimic activity. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:81938-81953. [PMID: 35739451 DOI: 10.1007/s11356-022-21619-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Accepted: 06/18/2022] [Indexed: 06/15/2023]
Abstract
In this study, an aqueous extract of Sclerocarya birrea leaves was used as a reducing agent to synthesize silver nanoparticles (AgNPs). The synthesis was carried out at room temperature and was both rapid and simple. Different characterization techniques such as UV/visible spectroscopy, surface-enhanced Raman spectroscopy, X-ray diffraction, and focused ion beam scanning electron microscopy were used to confirm the formation of AgNPs. The synthesized nanoparticles exhibited catalytic activity for the reduction of 4-nitrophenol, methyl orange, methylene blue, and rhodamine 6G. The catalytic activity was monitored by measuring the UV/visible absorbance spectra of the compounds using sodium borohydride as a reducing agent and found to be high. Additionally, the particles displayed oxidase-like activity. In the presence of AgNPs, 3, 3', 5, 5'-tetramethylbenzidine (TMB) which is colorless was transformed to oxidized TMB, which is blue, using dissolved oxygen as the oxidant. In the presence of Hg2+, the oxidase-like activity was enhanced. On the basis of this observation, an assay for the analysis of Hg2+ was developed. The linear range of the calibration curve is wide (0-600 µM) and the limit of detection (LOD) is low, as small as 34.8 nM. The method is strongly selective towards Hg2+. Tap water obtained from the laboratory where these experiments were carried out was used to study the feasibility of the method in real sample analyses.
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Affiliation(s)
- Melisew Tadele Alula
- Department of Chemical and Forensic Sciences, Faculty of Science, Botswana International University of Science and Technology, Plot 10071, Private Bag 16, Palapye, Botswana.
| | - Mildred Lesang Madingwane
- Department of Chemical and Forensic Sciences, Faculty of Science, Botswana International University of Science and Technology, Plot 10071, Private Bag 16, Palapye, Botswana
| | - Hongdan Yan
- Institute for Condensed Matter Physics and Lab. for Emergent Nanometrology (LENA), Braunschweig University of Technology, Mendelssohnsstr. 3, 38106, Braunschweig, Germany
| | - Peter Lemmens
- Institute for Condensed Matter Physics and Lab. for Emergent Nanometrology (LENA), Braunschweig University of Technology, Mendelssohnsstr. 3, 38106, Braunschweig, Germany
| | - Liu Zhe
- Institute Applied Physics and Lab. for Emergent Nanometrology (LENA), Braunschweig University of Technology, Mendelssohnsstr. 3, 38106, Braunschweig, Germany
| | - Markus Etzkorn
- Institute Applied Physics and Lab. for Emergent Nanometrology (LENA), Braunschweig University of Technology, Mendelssohnsstr. 3, 38106, Braunschweig, Germany
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Fan M, Pan Z, Wang C, Guo Y, Sun J, Liu M, Peng B, Wu J, Fang Y. Quantitative Visual Detection of Mercury Ions With Ratiometric Fluorescent Test Paper Sensor. Front Chem 2022; 10:859379. [PMID: 35402384 PMCID: PMC8990869 DOI: 10.3389/fchem.2022.859379] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 02/24/2022] [Indexed: 11/24/2022] Open
Abstract
A novel ratiometric fluorescence probe based on nitrogen-doped blue carbon dots (NCDs) and red gold nanoclusters (Au NCs) for mercuric ion (Hg2+) has been prepared and characterized. A user friendly fluorescent test paper based sensor combined with smartphone was fabricated for rapid visual and quantitative detection. Hg2+ can specifically bind to Au+ on the surface of Au NCs, leading to the quench of red fluorescence while the fluorescence intensity of the NCDs with blue fluorescence remained unchanged as a internal standard signal. The implement of paper-based sensor address some common drawback in analytical process such as the detection time, analysis cost. In a further demonstration, a homemade detection device with smartphone was used to qualify the Hg2+. After adding different concentration of Hg2+, red, purple, and blue colors were obtained on the detection zones of the fluorescent test paper. The Android App Color Grab was used to identify the red, green and blue (RGB) values of fluorescent color. The rapid visual and quantitative detection of Hg2+ was accomplished with the detection limit of 2.7 nM for fluorescence, 25 nM for smartphone and 32 nM for paper strip. The developed multi-mode detection platform was successfully applied to the detection of mercury ions in water samples with acceptable recoveries. The NCDs and Au NCs probe facilitate the one-site environmental monitoring for Hg2+ with “naked-eye” and smartphone.
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Affiliation(s)
- Mimi Fan
- The Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Environment and Operational Medicine, Tianjin, China
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, China
| | - Zhihui Pan
- The Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Environment and Operational Medicine, Tianjin, China
| | - Chunjuan Wang
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, China
| | - Yang Guo
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, China
| | - Jingran Sun
- The Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Environment and Operational Medicine, Tianjin, China
| | - Mingzhu Liu
- The Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Environment and Operational Medicine, Tianjin, China
| | - Bo Peng
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, China
- *Correspondence: Bo Peng, ; Jin Wu, ; Yanjun Fang,
| | - Jin Wu
- The Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Environment and Operational Medicine, Tianjin, China
- *Correspondence: Bo Peng, ; Jin Wu, ; Yanjun Fang,
| | - Yanjun Fang
- The Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Tianjin Institute of Environment and Operational Medicine, Tianjin, China
- *Correspondence: Bo Peng, ; Jin Wu, ; Yanjun Fang,
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Lei P, Tang C, Wang Y, Wu M, Kwong RWM, Jiang T, Zhong H. Understanding the effects of sulfur input on mercury methylation in rice paddy soils. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 778:146325. [PMID: 33725612 DOI: 10.1016/j.scitotenv.2021.146325] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 02/18/2021] [Accepted: 03/03/2021] [Indexed: 05/28/2023]
Abstract
Sulfur could be introduced into paddy soils via dry or wet deposition, irrigation, and fertilization, which subsequently impacts the production of methylmercury (MeHg), a bioaccumulative neurotoxicant. However, effects of sulfur input on MeHg production are variable, possibly due to the multiple effects of sulfur on Hg mobility and/or microbial Hg methylators, leading to uncertainties in predicting MeHg risk. To address that, we explored the effects of different types and amounts of sulfur as well as concentrations of ambient sulfate on Hg methylation in paddy soils, and elucidated the mechanisms by quantifying changes in (1) Hg mobility and (2) microbial Hg methylators (e.g., sulfate-reducing bacteria, SRB). Our results indicated that MeHg levels increased by 40-86% and 30-96% in soils under various types (i.e., 200 mg kg-1 elemental sulfur, ammonium sulfate, sulfur-coated urea and potassium sulfate (K2SO4)) and different amounts (i.e., 100, 200 and 400 mg kg-1 K2SO4) of sulfur input. The enhanced MeHg production could be explained by increased Hg mobility but not changes in microbial Hg methylators. Besides, sulfate input increased MeHg levels (89-240%) in soils with low ambient sulfate levels (<100 mg kg-1) but had no effect on high-sulfate soils (>380 mg kg-1). These could be explained by the diverse responses of Hg mobility and microbial Hg methylators to sulfate input at different ambient sulfate levels. Our study opens the "black box" of Hg methylation under sulfur input, which would help reduce uncertainties in predicting MeHg risk in soils.
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Affiliation(s)
- Pei Lei
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Chao Tang
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Yongjie Wang
- School of Geographic Sciences, East China Normal University, Shanghai 200241, China
| | - MengJie Wu
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | | | - Tao Jiang
- Interdisciplinary Research Centre for Agriculture Green Development in Yangtze River Basin, College of Resources and Environment, Southwest University, Chongqing 400716, China; Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Umeå SE-90183, Sweden
| | - Huan Zhong
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing 210023, China; Environmental and Life Science Program (EnLS), Trent University, Peterborough, Ontario, Canada.
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7
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Abstract
The anodic stripping voltammetry (ASV) was investigated to determine total mercury in solid samples using a gold electrode. The mercury was deposited on the gold electrode in a preconcentration step. The oxidation peak of mercury was irreversible. The optimal conditions of the procedure were found to be as follows: 0.05 mol L−1 HCl solution, deposition potential −0.5 V vs. Ag/AgCl/KCls, deposition time 40 s, and sweep rate 0.04 V s−1. Under the optimal conditions, the peak current showed a linear dependence on Hg2+ concentration in the range from 0.01 to 0.1 mg l−1. The detection limit and quantification limit were 4.28 µg L−1 and 12.98 µg L−1, respectively. The mean recovery and relative standard deviation were 91.2% and 2.4% (n = 9). The procedure was successfully applied for determining total mercury in samples collected from Hanoi light bulb warehouse—The Rang Dong Light Source and Vacuum Flask JSC. The results were compared with cold vapor atomic absorption spectrometry (CV-AAS).
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9
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Development of green vortex-assisted supramolecular solvent-based liquid–liquid microextraction for preconcentration of mercury in environmental and biological samples prior to spectrophotometric determination. Microchem J 2020. [DOI: 10.1016/j.microc.2020.105108] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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10
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Miranda-Andrades JR, Letichevsky S, González Larrudé DR, Aucelio RQ. Photo-generation of mercury cold vapor mediated by graphene quantum dots/TiO 2 nanocomposite: On line time-resolved speciation at ultra-trace levels. Anal Chim Acta 2020; 1127:256-268. [PMID: 32800131 DOI: 10.1016/j.aca.2020.06.048] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 06/05/2020] [Accepted: 06/20/2020] [Indexed: 10/23/2022]
Abstract
Mercury speciation was achieved using a nanocomposite, consisting of graphene quantum dots (GQDs) and TiO2 nanoparticles, to mediate photo-degradation of mercurial species into the Hg cold vapor detected by atomic spectrometry. Sample solution (containing Hg2+, CH3CH2Hg, and CH3Hg at hundreds of ng L-1) was placed in quartz tube containing formic acid solution (2% v/v) and microliter aliquot of GQDs/TiO2 nanocomposite dispersion (0.6 mg of nanocomposite). The tube was placed inside a photochemical reactor then, adapted to the mercury-dedicated spectrometer. Quantitative speciation was achieved taking advantage of the differences in UV photodegradation kinetics: Hg2+ (5 min), CH3CH2Hg (9 min) and CH3Hg (13 min). Gas-chromatography cold vapor atomic fluorescence spectrometry was used to confirm the evolution of the reactions over time during photo-reaction. The limits of detection were 10 ng L-1 for CH3CH2Hg and 7 ng L-1 for Hg2+ and CH3Hg.
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Affiliation(s)
- Jarol R Miranda-Andrades
- Department of Chemistry, Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro, 22451-900, Brazil
| | - Sonia Letichevsky
- Department of Chemical Engineering and Materials, Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro, 22451-900, Brazil
| | | | - Ricardo Q Aucelio
- Department of Chemistry, Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro, 22451-900, Brazil.
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Pajewska-Szmyt M, Buszewski B, Gadzała-Kopciuch R. Carbon dots as rapid assays for detection of mercury(II) ions based on turn-off mode and breast milk. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 236:118320. [PMID: 32278279 DOI: 10.1016/j.saa.2020.118320] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 03/27/2020] [Accepted: 03/29/2020] [Indexed: 06/11/2023]
Abstract
In this research, nitrogen co-doped carbon dots were synthesized by solid thermal method with citric acid used as the precursor of carbon, and melamine as nitrogen source. Such carbon dots show high quantum yield of 44%. Furthermore, the native fluorescence of CDs can be reduced by mercury(II), while other metals had no significant influence on fluorescence intensity. During the study, the optimal parameters were selected, such as pH or time for incubation with analyte. Under the optimal conditions, quenching effect caused by mercury ions was evaluated. It was observed that with increasing mercury concentration, the fluorescence of the carbon dots decreased proportionally. The response was characterized by linearity within the range from 2 to 14 μM. Moreover, the limit of detection was 0.44 μM. It was the first time that human milk was used as a real sample to test the applicability of carbon dots. The study results demonstrated good recovery in the 74-111% range (RSD < 6%) As a novel carbon material, CDs show promise for broader applications in analyzing complicated biological samples.
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Affiliation(s)
- Martyna Pajewska-Szmyt
- Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University in Toruń, 7 Gagarin St., 87-100 Toruń, Poland; Interdisciplinary Centre for Modern Technologies, Nicolaus Copernicus University, 4 Wileńska St, PL-87-100 Toruń, Poland.
| | - Bogusław Buszewski
- Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University in Toruń, 7 Gagarin St., 87-100 Toruń, Poland; Interdisciplinary Centre for Modern Technologies, Nicolaus Copernicus University, 4 Wileńska St, PL-87-100 Toruń, Poland
| | - Renata Gadzała-Kopciuch
- Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University in Toruń, 7 Gagarin St., 87-100 Toruń, Poland; Interdisciplinary Centre for Modern Technologies, Nicolaus Copernicus University, 4 Wileńska St, PL-87-100 Toruń, Poland
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Ultrasound assisted-dispersive-modification solid-phase extraction using task-specific ionic liquid immobilized on multiwall carbon nanotubes for speciation and determination mercury in water samples. Microchem J 2020. [DOI: 10.1016/j.microc.2020.104632] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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13
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Interference-free, green microanalytical method for total mercury and methylmercury determination in biological and environmental samples using small-sized electrothermal vaporization capacitively coupled plasma microtorch optical emission spectrometry. Talanta 2020; 217:121067. [PMID: 32498880 DOI: 10.1016/j.talanta.2020.121067] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 04/17/2020] [Accepted: 04/20/2020] [Indexed: 01/04/2023]
Abstract
An analytical method for the quantification of total Hg and CH3Hg+ in biological tissues (fish, mushroom) and water sediment was developed based on small-sized electrothermal vaporization capacitively coupled plasma microtorch optical emission spectrometry using a low-resolution microspectrometer as detector. Sample preparation was carried out according to the procedure recommended by JRC Technical Report of European Commission for the determination of CH3Hg+ in seafood and adapted by us for lower consumption of reagents. Amounts of 0.1 - 0.5 g sample were subjected to extraction in 5 ml of 47% HBr then CH3Hg+ was extracted in 2 × 1 ml toluene and back-extracted in 2 ml aqueous solution of 1% l-cysteine. Total Hg/CH3Hg+ were quantified in 10 μl of acidic extract/l-cysteine solution after electrothermal vaporization and measurement of 253.652 nm Hg signal in the episodic emission spectra. Under the optimal working conditions of system (70 °C sample drying, 1300 °C sample vaporization, 10 W plasma power and 150 ml min-1 Ar flow) the limits of detection were 7.0 μg kg-1 total Hg and 3.5 μg kg-1 CH3Hg+. Comparison of slopes in external calibration and standard addition procedure revealed the lack of non-spectral interferences of multimineral matrix, so that the calibration against Hg2+ standards was adopted. Pooled recovery of total mercury/methylmercury was 101 ± 7%/100 ± 7%, while precision assessed from measurements of real samples was in the range 1.6-9.6%/2.7-12.8%. The proposed method validated according to Eurachem Guide 2014 is selective and complies with demands in European legislation (Decisions 657/2002; 333/2007; 836/2011) and Association of Official Analytical Chemists Guide in terms of performances for food control. The method displays a high degree of greenness by circumventing cold vapor generation, use of small amounts of reagents and full-miniaturized instrumentation resulting in low analytical costs without reducing results quality. Besides, the method is simple and rapid, since it uses external calibration curves prepared from Hg2+standard solutions both for total Hg and CH3Hg+ determination.
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Liu J, Xue H, Liu Y, Bu T, Jia P, Shui Y, Wang L. Visual and fluorescent detection of mercury ions using a dual-emission ratiometric fluorescence nanomixture of carbon dots cooperating with gold nanoclusters. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 223:117364. [PMID: 31323491 DOI: 10.1016/j.saa.2019.117364] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Revised: 06/16/2019] [Accepted: 07/07/2019] [Indexed: 06/10/2023]
Abstract
Mercury (II) ions (Hg2+), as one of the most toxic heavy metals, can cause irreversible damage to human health even at very low concentration due to its high toxicity and bioaccumulation. Herein, a facile ratiometric fluorescence nanomixture based on carbon dots‑gold nanoclusters (CDs-Au NCs) was constructed for quantitative detection of Hg2+. Lysine functionalized carbon dots (CDs) were prepared by one-pot hydrothermal method, while gold nanoclusters (Au NCs) were synthesized via using chicken egg white (CEW) as reducer and stabilizer. The novel nanomixture exhibited two strong emission peaks at 450 nm and 665 nm under 390 nm excitation, and showed pink fluorescence under UV light. Interestingly, the fluorescence of the CDs-Au NCs nanomixture was selectively response to Hg2+. The fluorescence of Au NCs at 665 nm was decreased when Hg2+ was presented in the solution, while the fluorescence of CDs at 450 nm stayed constant. The fluorescence color changed from pink to blue obviously with increasing the concentration of Hg2+, which indicated that CDs-Au NCs could be used for visual detection Hg2+ by the naked eye. Under optimal conditions, this ratiometric fluorescent sensor could detect Hg2+ accurately and possess a great sensitivity with a detection limit of 63 nM. In addition, this method was applied to detect Hg2+ in real water samples with great recoveries, suggesting its potential in practical application with simplicity, environmentally friendly and low cost.
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Affiliation(s)
- Jinghan Liu
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Hanyue Xue
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Yingnan Liu
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Tong Bu
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Pei Jia
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Yuhang Shui
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Li Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100, Shaanxi, China.
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15
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Hu P, Wang X, Yang L, Yang H, Tang Y, Luo H, Xiong X, Jiang X, Huang K. Speciation of mercury by hydride generation ultraviolet atomization-atomic fluorescence spectrometry without chromatographic separation. Microchem J 2018. [DOI: 10.1016/j.microc.2018.08.013] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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16
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Liu H, Luo J, Ding T, Gu S, Yang S, Yang M. Speciation Analysis of Trace Mercury in Sea Cucumber Species of Apostichopus japonicus Using High-Performance Liquid Chromatography Conjunction With Inductively Coupled Plasma Mass Spectrometry. Biol Trace Elem Res 2018; 186:554-561. [PMID: 29574672 DOI: 10.1007/s12011-018-1309-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Accepted: 03/14/2018] [Indexed: 12/29/2022]
Abstract
In this paper, a simple and cost-effective method using high-performance liquid chromatography in conjunction with inductively coupled plasma mass spectrometry with a rapid ultrasound-assisted extraction was used for analysis speciation of trace mercury in sea cucumber species of Apostichopus japonicus. The effective separation of inorganic mercury, methylmercury, and ethylmercury was achieved within 10 min using Agilent ZORBAX SB-C18 analytical and guard columns with an isocratic mobile phase consisting of 8% methanol and 92% H2O containing 0.12% L-cysteine (m/v) and 0.01 mol/L ammonium acetate. Mercury species were extracted from A. japonicus samples using a solution containing 2-mercaptoethanol, L-cysteine, and hydrochloric acid and sonicating for 0.5 h. The limits of detection of inorganic mercury, methylmercury, and ethylmercury were 0.12, 0.08, and 0.20 μg/L, and the minimum detectable concentrations (measured at 0.500 g sample volume in 10.00 mL) were 2.4, 1.6, and 4.0 μg/kg, respectively. Analysis of a scallop certified reference material (GBW 10024) revealed accordance between the experimental and certified values. This study provides a reference for the evaluation of mercury speciation in sea cucumber and other seafood.
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Affiliation(s)
- Hao Liu
- College of Traditional Chinese Medicine, Jilin Agricultural University, Changchun, 130118, China
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China
| | - Jiaoyang Luo
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China
| | - Tong Ding
- College of Traditional Chinese Medicine, Jilin Agricultural University, Changchun, 130118, China
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China
| | - Shanyong Gu
- College of Pharmacy, Heilongjiang University of Chinese Medicine, Harbin, 150040, China
| | - Shihai Yang
- College of Traditional Chinese Medicine, Jilin Agricultural University, Changchun, 130118, China.
| | - Meihua Yang
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China.
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17
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Covaci E, Angyus SB, Senila M, Ponta M, Darvasi E, Frentiu M, Frentiu T. Eco-scale non-chromatographic method for mercury speciation in fish using formic acid extraction and UV–Vis photochemical vapor generation capacitively coupled plasma microtorch optical emission spectrometry. Microchem J 2018. [DOI: 10.1016/j.microc.2018.05.023] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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18
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Facile Ag-Film Based Surface Enhanced Raman Spectroscopy Using DNA Molecular Switch for Ultra-Sensitive Mercury Ions Detection. NANOMATERIALS 2018; 8:nano8080596. [PMID: 30082591 PMCID: PMC6116212 DOI: 10.3390/nano8080596] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/01/2018] [Revised: 07/29/2018] [Accepted: 08/01/2018] [Indexed: 01/17/2023]
Abstract
Heavy metal pollution has long been the focus of attention because of its serious threat to human health and the environment. Surface enhanced Raman spectroscopy (SERS) has shown great potential for metal detection owing to many advantages, including, requiring fewer samples, its minimal damage to specimen, and its high sensitivity. In this work, we proposed a simple and distinctive method, based on SERS, using facile silver film (Ag-film) combined with a DNA molecular switch, which allowed for the highly specific detection of heavy metal mercury ions (Hg2+). When in the presence of Hg2+ ions, the signals from Raman probes attach to single-stranded DNA, which will be dramatically enhanced due to the specific structural change of DNA strands-resulting from the interaction between Hg2+ ions and DNA bases. This SERS sensor could achieve an ultralow limit of detection (1.35 × 10-15 M) for Hg2+ detection. In addition, we applied this SERS sensor to detect Hg2+ in real blood samples. The results suggested that this SERS platform could be a promising alternative tool for Hg2+ detection in clinical, environmental, and food inspection.
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19
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Cárdenas Valdivia A, López Guerrero M, Vereda Alonso E, Cano Pavón J, García de Torres A. Determination of As, Sb and Hg in water samples by flow injection coupled HR CS ETAAS with an in situ hydride generator. Microchem J 2018. [DOI: 10.1016/j.microc.2018.01.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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20
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Covaci E, Senila M, Ponta M, Darvasi E, Frentiu M, Frentiu T. Mercury speciation in seafood using non-chromatographic chemical vapor generation capacitively coupled plasma microtorch optical emission spectrometry method – Evaluation of methylmercury exposure. Food Control 2017. [DOI: 10.1016/j.foodcont.2017.07.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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21
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Covaci E, Senila M, Ponta M, Darvasi E, Petreus D, Frentiu M, Frentiu T. Methylmercury determination in seafood by photochemical vapor generation capacitively coupled plasma microtorch optical emission spectrometry. Talanta 2017; 170:464-472. [PMID: 28501197 DOI: 10.1016/j.talanta.2017.04.036] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 04/12/2017] [Accepted: 04/15/2017] [Indexed: 12/25/2022]
Abstract
A non-chromatographic method based on double liquid-liquid extraction and measurements by UV photochemical vapor generation capacitively coupled plasma microtorch optical emission spectrometry was developed and characterized for methylmercury determination in seafood. Samples were prepared following the procedure recommended in JRC Technical Report of European Commission formerly proposed for the determination of methylmercury in seafood by thermal decomposition atomic absorption spectrometry, namely confinement of Hg species in 47% HBr solution, extraction of CH3Hg+ in toluene and back-extraction in 1% l-cysteine aqueous solution. Mercury cold vapor was generated by flow injection UV photo-reduction from CH3Hg+ in 0.6molL-1 HCOOH, while quantification was performed against external Hg2+ aqueous standards and measuring Hg 253.652nm emission using a low power/Ar consumption plasma microtorch (15W, 100mLmin-1) and a low resolution microspectrometer (Ocean Optics). The figures of merit and analytical capability were assessed by analyzing certified reference materials and test samples of fish fillet and discussed in relation with requirements for Hg determination in seafood in European legislation (Decisions 2007/333/EC and 2002/657/EC) as well as compared to performances achieved in thermal decomposition atomic absorption spectrometry. The limit of detection and quantification of 2µgkg-1 and 6µgkg-1 respectively, precision of 2.7-9.4% and accuracy of 99±8% of the proposed method for the determination of CH3Hg+ fulfill the demands of European legislation for Hg quantification. The limit of detection and quantification were better than those in the used reference method or other non-/chromatographic methods taken for comparison. The analysis of certified reference materials and the Bland and Altman test performed on 12 test samples confirmed trueness of the proposed method and its reliability for the determination of traces of CH3Hg+ with 95% confidence level. The proposed method fulfills several demands of the eco-scale concept, is sensitive, simple and safe related to sample preparation through elimination of classical, harmful reductants and attractive by using economical miniaturized instrumentation incorporating a low power and low Ar consumption plasma.
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Affiliation(s)
- Eniko Covaci
- Babes-Bolyai University, Faculty of Chemistry and Chemical Engineering, Arany Janos 11, 400028 Cluj-Napoca, Romania
| | - Marin Senila
- National Institute for Research and Development of Optoelectronics Bucharest, Research Institute for Analytical Instrumentation, Donath 67, 400293 Cluj-Napoca, Romania
| | - Michaela Ponta
- Babes-Bolyai University, Faculty of Chemistry and Chemical Engineering, Arany Janos 11, 400028 Cluj-Napoca, Romania
| | - Eugen Darvasi
- Babes-Bolyai University, Faculty of Chemistry and Chemical Engineering, Arany Janos 11, 400028 Cluj-Napoca, Romania
| | - Dorin Petreus
- Technical University of Cluj-Napoca, Faculty of Electronics, Telecommunications and Information Technology, Gh. Baritiu 26-28, 40002 Cluj-Napoca, Romania
| | - Maria Frentiu
- National Institute for Research and Development of Optoelectronics Bucharest, Research Institute for Analytical Instrumentation, Donath 67, 400293 Cluj-Napoca, Romania
| | - Tiberiu Frentiu
- Babes-Bolyai University, Faculty of Chemistry and Chemical Engineering, Arany Janos 11, 400028 Cluj-Napoca, Romania.
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22
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Chen P, Wu P, Chen J, Yang P, Zhang X, Zheng C, Hou X. Label-Free and Separation-Free Atomic Fluorescence Spectrometry-Based Bioassay: Sensitive Determination of Single-Strand DNA, Protein, and Double-Strand DNA. Anal Chem 2016; 88:2065-71. [DOI: 10.1021/acs.analchem.5b03307] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
| | | | | | | | - Xinfeng Zhang
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, Sichuan 610059, China
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23
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Determination of Mercury Species in Fish and Seafood by Gas Chromatography-Mass Spectrometry: Validation Study. FOOD ANAL METHOD 2015. [DOI: 10.1007/s12161-015-0120-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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24
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Qi G, Fu C, Chen G, Xu S, Xu W. Highly sensitive SERS sensor for mercury ions based on the catalytic reaction of mercury ion decorated Ag nanoparticles. RSC Adv 2015. [DOI: 10.1039/c5ra08009f] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Schematic diagram of the SERS sensing mechanism for mercury ions by a catalytic oxidation reaction.
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Affiliation(s)
- Guohua Qi
- State Key Laboratory of Supramolecular Structure and Materials
- Institute of Theoretical Chemistry
- Jilin University
- Changchun
- People's Republic of China
| | - Cuicui Fu
- State Key Laboratory of Supramolecular Structure and Materials
- Institute of Theoretical Chemistry
- Jilin University
- Changchun
- People's Republic of China
| | - Gang Chen
- State Key Laboratory of Supramolecular Structure and Materials
- Institute of Theoretical Chemistry
- Jilin University
- Changchun
- People's Republic of China
| | - Shuping Xu
- State Key Laboratory of Supramolecular Structure and Materials
- Institute of Theoretical Chemistry
- Jilin University
- Changchun
- People's Republic of China
| | - Weiqing Xu
- State Key Laboratory of Supramolecular Structure and Materials
- Institute of Theoretical Chemistry
- Jilin University
- Changchun
- People's Republic of China
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25
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Frentiu T, Butaciu S, Ponta M, Senila M, Darvasi E, Frentiu M, Petreus D. Determination of Total Mercury in Fish Tissue Using a Low-Cost Cold Vapor Capacitively Coupled Plasma Microtorch Optical Emission Microspectrometer: Comparison with Direct Mercury Determination by Thermal Decomposition Atomic Absorption Spectrometry. FOOD ANAL METHOD 2014. [DOI: 10.1007/s12161-014-9940-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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26
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Špirić Z, Vučković I, Stafilov T, Kušan V, Frontasyeva M. Air pollution study in Croatia using moss biomonitoring and ICP-AES and AAS analytical techniques. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2013; 65:33-46. [PMID: 23467710 DOI: 10.1007/s00244-013-9884-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2012] [Accepted: 02/11/2013] [Indexed: 06/01/2023]
Abstract
Moss biomonitoring technique was applied in a heavy-metal pollution study of Croatia in 2006 when this country participated in the European moss survey for the first time. This survey was repeated in 2010, and the results are presented in this study. For this purpose, 121 moss samples were collected during summer and autumn 2010. The content of 21 elements was determined by inductively coupled plasma-atomic emission spectrometry and atomic absorption spectrometry. Principal component analyses was applied to show the association between the elements. Six factors (F1-F6) were determined, of which two are anthropogenic (F3 and F6), two are mixed geogenic-anthropogenic (F1 and F5), and two are geogenic factors (F2 and F4). Geographical distribution maps of the elements over the sampled territory were constructed using geographic information systems technology. Comparison of the median values of some of the anthropogenic elements-such as arsenic, cadmium, chromium, copper, mercury, nickel, lead, vanadium, and zinc-with those from the 2006 study shows that anthropogenic pollution has changed insignificantly during the last 5 years. The data obtained in the investigation in Norway are taken for comparison with pristine area, which indicates that Croatia is somewhat polluted but still, shows a more favourable picture when compared with two neighbouring countries.
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Affiliation(s)
- Zdravko Špirić
- Institute for Applied Ecology, OIKON Ltd., Trg senjskih uskoka 1-2, 10020 Zagreb, Croatia.
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27
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Duarte FA, Soares BM, Vieira AA, Pereira ER, Maciel JV, Caldas SS, Primel EG. Assessment of Modified Matrix Solid-Phase Dispersion as Sample Preparation for the Determination of CH3Hg+ and Hg2+ in Fish. Anal Chem 2013; 85:5015-22. [DOI: 10.1021/ac4002436] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Fabio A. Duarte
- Escola de
Química e Alimentos, Universidade Federal do Rio Grande, 96203-900, Rio
Grande, RS, Brazil
| | - Bruno M. Soares
- Escola de
Química e Alimentos, Universidade Federal do Rio Grande, 96203-900, Rio
Grande, RS, Brazil
| | - Augusto A. Vieira
- Escola de
Química e Alimentos, Universidade Federal do Rio Grande, 96203-900, Rio
Grande, RS, Brazil
| | - Ederson R. Pereira
- Escola de
Química e Alimentos, Universidade Federal do Rio Grande, 96203-900, Rio
Grande, RS, Brazil
| | - Juliana V. Maciel
- Escola de
Química e Alimentos, Universidade Federal do Rio Grande, 96203-900, Rio
Grande, RS, Brazil
| | - Sergiane S. Caldas
- Escola de
Química e Alimentos, Universidade Federal do Rio Grande, 96203-900, Rio
Grande, RS, Brazil
| | - Ednei G. Primel
- Escola de
Química e Alimentos, Universidade Federal do Rio Grande, 96203-900, Rio
Grande, RS, Brazil
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28
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Determination and speciation of mercury in environmental and biological samples by analytical atomic spectrometry. Microchem J 2012. [DOI: 10.1016/j.microc.2012.02.001] [Citation(s) in RCA: 194] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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29
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Speciation of mercury in fish samples by flow injection catalytic cold vapour atomic absorption spectrometry. Anal Chim Acta 2012; 721:22-7. [DOI: 10.1016/j.aca.2012.01.038] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2011] [Revised: 01/17/2012] [Accepted: 01/19/2012] [Indexed: 11/22/2022]
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30
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Frentiu T, Mihaltan AI, Ponta M, Darvasi E, Frentiu M, Cordos E. Mercury determination in non- and biodegradable materials by cold vapor capacitively coupled plasma microtorch atomic emission spectrometry. JOURNAL OF HAZARDOUS MATERIALS 2011; 193:65-69. [PMID: 21802847 DOI: 10.1016/j.jhazmat.2011.07.031] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2011] [Revised: 07/07/2011] [Accepted: 07/07/2011] [Indexed: 05/31/2023]
Abstract
A new analytical system consisting of a low power capacitively coupled plasma microtorch (20 W, 13.56 MHz, 150 ml min(-1) Ar) and a microspectrometer was investigated for the Hg determination in non- and biodegradable materials by cold-vapor generation, using SnCl(2) reductant, and atomic emission spectrometry. The investigated miniaturized system was used for Hg determination in recyclable plastics from electronic equipments and biodegradable materials (shopping bags of 98% biodegradable polyethylene and corn starch) with the advantages of easy operation and low analysis costs. Samples were mineralized in HNO(3)-H(2)SO(4) mixture in a high-pressure microwave system. The detection limits of 0.05 ng ml(-1) or 0.08 μg g(-1) in solid sample were compared with those reported for other analytical systems. The method precision was 1.5-9.4% for Hg levels of 1.37-13.9 mg kg(-1), while recovery in two polyethylene certified reference materials in the range 98.7 ± 4.5% (95% confidence level).
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Affiliation(s)
- Tiberiu Frentiu
- Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, Arany Janos 11, 400028 Cluj-Napoca, Romania.
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31
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Zhang WB, Yang XA, Ma YY, Zhu HX, Wang SB. Continuous flow electrolytic cold vapor generation atomic fluorescence spectrometric determination of Hg in water samples. Microchem J 2011. [DOI: 10.1016/j.microc.2010.09.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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32
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Reyes LH, Mar JLG, Hernández-Ramírez A, Peralta-Hernández JM, Barbosa JMA, Kingston HMS. Microwave assisted extraction for mercury speciation analysis. Mikrochim Acta 2010. [DOI: 10.1007/s00604-010-0473-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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33
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Torres DP, Frescura VL, Curtius AJ. Simple mercury fractionation in biological samples by CV AAS following microwave-assisted acid digestion or TMAH pre-treatment. Microchem J 2009. [DOI: 10.1016/j.microc.2009.07.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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34
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Pereira E, Rodrigues S, Otero M, Válega M, Lopes C, Pato P, Coelho J, Lillebø A, Duarte A, Pardal M, Rocha R. Evaluation of an interlaboratory proficiency-testing exercise for total mercury in environmental samples of soils, sediments and fish tissue. Trends Analyt Chem 2008. [DOI: 10.1016/j.trac.2008.09.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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