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52
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Selective speciation of inorganic antimony on tetraethylenepentamine bonded silica gel column and its determination by graphite furnace atomic absorption spectrometry. Talanta 2013; 107:162-6. [DOI: 10.1016/j.talanta.2013.01.010] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2012] [Revised: 01/06/2013] [Accepted: 01/08/2013] [Indexed: 11/19/2022]
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53
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Deng F, Dong R, Yu K, Luo X, Tu X, Luo S, Yang L. Determination of trace total inorganic arsenic by hydride generation atomic fluorescence spectrometry after solid phase extraction-preconcentration on aluminium hydroxide gel. Mikrochim Acta 2013. [DOI: 10.1007/s00604-013-0941-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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54
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Dos Passos AS, Néri TS, Maciel MV, da Silva Romão IL, Lemos VA. Determination of arsenic in chicken feed by hydride generation atomic absorption spectrometry after pre-concentration with polyurethane foam. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2012; 29:1689-95. [PMID: 22845621 DOI: 10.1080/19440049.2012.706833] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
A pre-concentration procedure with solid-phase extraction was developed for the determination of arsenic (As) in chicken feed using hydride generation atomic absorption spectrometry (HG-AAS). The procedure was based on the sorption of As(III) ions as complexes with ammonium pyrrolidine dithiocarbamate onto a mini-column packed with polyurethane foam. After pre-concentration, the As was removed from the mini-column by acid solution, and the analyte content in the eluate was measured by HG-AAS. The following main experimental conditions were established: adjustment of the As solution pH with 0.05 mol l⁻¹ HCl, 2.88 × 10⁻³ mol l⁻¹ complexing agent concentration and 6.0 mol l⁻¹ eluting hydrochloric acid concentration. The proposed method produced an enrichment factor of 67, with 0.050 and 0.165 µg g⁻¹ limits of detection and quantification, respectively. The procedure was applied to the determination of As content in two types of chicken feed using the proposed procedure and atomic absorption spectrometry with electrothermal atomisation (ETAAS). The t-test indicated that the results were not significantly different at a confidence level of 95%.
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Affiliation(s)
- A S Dos Passos
- Laboratório de Química Analítica-LQA, Universidade Estadual do Sudoeste da Bahia, Campus de Jequié, 45206-510 Jequié-BA, Brazil
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55
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Daneshfar A, Ghaedi M, Vafafard S, Shiri L, Sahrai R, Soylak M. Amberlite IR-120 modified with 8-hydroxyquinoline as efficient adsorbent for solid-phase extraction and flame atomic absorption determination of trace amounts of some metal ions. Biol Trace Elem Res 2012; 145:240-7. [PMID: 21858410 DOI: 10.1007/s12011-011-9171-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2011] [Accepted: 08/05/2011] [Indexed: 11/26/2022]
Abstract
In this study, a solid-phase extraction method combined with atomic absorption spectrometry for extraction, preconcentration, and determination of iron (Fe(3+)), copper (Cu(2+)), and lead (Pb(2+)) ions at trace levels in water samples has been reported. The influences of effective parameters such as flow rate, pH, eluent conditions (type, volume, and concentration), sample volumes, and interference of matrix ions on metal ions recoveries were studied. Under optimized conditions, the limits of detection were found in the range of 0.7-2.2 μg L(-1), while preconcentration factors for Fe(3+), Cu(2+), and Pb(2+) ions were found to be 166, 200, and 250, respectively, and loading half time (t (1/2)) values were less than 2 min for all analyte ions. The proposed procedure was applied for the determination of metal ions in different water samples with recovery of >94.4% and relative standard deviation less than 4.4% for N = 5.
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Affiliation(s)
- Ali Daneshfar
- Department of Chemistry, Faculty of Science, Ilam University, Ilam 69315-516, Iran.
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56
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Batista BL, Grotto D, Carneiro MFH, Barbosa F. Evaluation of the concentration of nonessential and essential elements in chicken, pork, and beef samples produced in Brazil. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2012; 75:1269-79. [PMID: 23030653 DOI: 10.1080/15287394.2012.709439] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Food safety is a global concern. Meat represents the most important protein source for humans. Thus, contamination of meat products by nonessential elements is a ready source of human exposure. In addition, knowledge of the concentration of essential elements is also relevant with respect to human nutrition. The aim of the present study was to determine the concentration of 17 elements in pork, beef, and chicken produced in Brazil. Meat samples were analyzed by inductively coupled plasma mass spectrometry. The estimated daily intake for nonessential elements including arsenic (As), cadmium (Cd), lead (Pb), mercury (Hg), and antimony (Sb) through meat consumption is below the toxicological reference values. However, high levels were detected for the nonessential element cesium (Cs), mainly in beef samples, an observation that deserves future studies to identify the source of contamination and potential adverse consequences.
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Affiliation(s)
- Bruno Lemos Batista
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
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57
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Wadhwa SK, Kazi TG, Kolachi NF, Afridi HI, Khan S, Chandio AA, Shah AQ, Kandhro GA, Nasreen S. Case-control study of male cancer patients exposed to arsenic-contaminated drinking water and tobacco smoke with relation to non-exposed cancer patients. Hum Exp Toxicol 2011; 30:2013-22. [PMID: 21558145 DOI: 10.1177/0960327111408154] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2023]
Abstract
The investigated data indicated that inorganic arsenic in drinking water is associated with increased mortality from different types of cancers. In the present study, biological samples (blood and scalp hair) of male subjects having lung and bladder cancers and non-cancerous subjects belonging to arsenic (As)-exposed area of southern parts of Pakistan were analysed for As contents. The As levels in drinking water of understudy area showed that sections of understudy population are exposed to arsenic concentrations, which was 3-15-fold higher than the permissible level (<10 μg/L). For comparative purposes the biological samples of matched male cancer patient, as referent patients belonging to big city (Hyderabad) who had used municipal treated water with low arsenic levels <10 μg/L, were also collected. The exposed cancer patients have 2-3-fold higher level of As in both biological samples compared to non-exposed case-matched cancerous male subjects. This study is compelling evidence in support of positive associations between arsenic-contaminated water, food and cigarette with different types of risks of cancer.
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Affiliation(s)
- Sham Kumar Wadhwa
- Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, Pakistan.
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58
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Wadhwa SK, Kazi TG, Chandio AA, Afridi HI, Kolachi NF, Khan S, Kandhro GA, Nasreen S, Shah AQ, Baig JA. Comparative study of liver cancer patients in arsenic exposed and non-exposed areas of Pakistan. Biol Trace Elem Res 2011; 144:86-96. [PMID: 21448561 DOI: 10.1007/s12011-011-9036-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2011] [Accepted: 03/14/2011] [Indexed: 11/27/2022]
Abstract
The investigated data shows that arsenic (As) in drinking water is associated with increased mortality from different types of cancers including liver cancer. In this study, blood and scalp hair samples of male liver cancer patients and healthy referents belonging to As exposed areas of Sindh Pakistan were analyzed for As contents. The As levels in drinking water of understudy area showed that sections of this population was exposed to 3-15-folds higher concentrations of As than permissible limit. For comparative purposes, blood and scalp hair samples of matched cancerous patient as referent patients belonging to big city (Hyderabad) who have used municipal treated water with low As levels <10 μg/L were also collected. The results of this study showed that the average As concentration was higher in the blood and scalp hair of exposed and non-exposed referent cancer patients as compared to referents (p < 001). The exposed cancerous patients have twofolds higher As level in both biological samples as related to non-exposed case matched cancerous male subjects.
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Affiliation(s)
- Sham Kumar Wadhwa
- National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, 76080, Pakistan.
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59
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López-García I, Rivas RE, Hernández-Córdoba M. Use of carbon nanotubes and electrothermal atomic absorption spectrometry for the speciation of very low amounts of arsenic and antimony in waters. Talanta 2011; 86:52-7. [DOI: 10.1016/j.talanta.2011.07.105] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2011] [Revised: 07/28/2011] [Accepted: 07/31/2011] [Indexed: 12/01/2022]
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60
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Shokrollahi A, Ghaedi M, Alipour S, Kianfar AH. Spectrophotometric study of complexation between a series of salophens and some transition metal ions in DMF solvent. ACTA ACUST UNITED AC 2011. [DOI: 10.5155/eurjchem.2.3.324-330.272] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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61
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Yousefi SR, Shemirani F. Novel method for in-situ surfactant-based solid-phase extraction: application to the determination of Co(II) and Ni(II) in aqueous samples. Mikrochim Acta 2011. [DOI: 10.1007/s00604-011-0579-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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62
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Baig JA, Kazi TG, Shah AQ, Afridi HI, Kandhro GA, Khan S, Kolachi NF, Wadhwa SK, Shah F, Arain MB, Jamali MK. Evaluation of arsenic levels in grain crops samples, irrigated by tube well and canal water. Food Chem Toxicol 2010; 49:265-70. [PMID: 21056610 DOI: 10.1016/j.fct.2010.11.002] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2010] [Revised: 10/12/2010] [Accepted: 11/01/2010] [Indexed: 11/30/2022]
Abstract
The aim of this study was to evaluate the uptake of arsenic (As) by grain crops (wheat, maize and sorghum) grown on agricultural soil irrigated with tube well water (SIT) as test samples and for comparative purposes, same grain crop samples grown on agricultural soil irrigated with fresh canal water (SIC) were marked as control samples, collected simultaneously from three sub-districts of Khairpur, Pakistan. Moreover, this paper demonstrated the total and EDTA (0.05 M) extractable As in both understudied soils that correlate with the respective total As in the edible parts of the studied grain crops. A significantly high accumulation of As was found in grains grown on SIT as compared to those grown on SIC. This study highlights the increased danger of growing food crops in the agricultural land continuously irrigated by As contaminated ground water.
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Affiliation(s)
- Jameel A Baig
- National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, Pakistan
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63
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Baig JA, Kazi TG, Shah AQ, Arain MB, Afridi HI, Khan S, Kandhro GA, Naeemullah, Soomro AS. Evaluating the accumulation of arsenic in maize (Zea mays L.) plants from its growing media by cloud point extraction. Food Chem Toxicol 2010; 48:3051-7. [DOI: 10.1016/j.fct.2010.07.043] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2010] [Revised: 07/16/2010] [Accepted: 07/28/2010] [Indexed: 11/15/2022]
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64
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Escherichia coli as a bioreporter in ecotoxicology. Appl Microbiol Biotechnol 2010; 88:1007-25. [PMID: 20803141 DOI: 10.1007/s00253-010-2826-6] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2010] [Revised: 08/02/2010] [Accepted: 08/03/2010] [Indexed: 01/30/2023]
Abstract
Ecotoxicological assessment relies to a large extent on the information gathered with surrogate species and the extrapolation of test results across species and different levels of biological organisation. Bacteria have long been used as a bioreporter for genotoxic testing and general toxicity. Today, it is clear that bacteria have the potential for screening of other toxicological endpoints. Escherichia coli has been studied for years; in-depth knowledge of its biochemistry and genetics makes it the most proficient prokaryote for the development of new toxicological assays. Several assays have been designed with E. coli as a bioreporter, and the recent trend to develop novel, better advanced reporters makes bioreporter development one of the most dynamic in ecotoxicology. Based on in-depth knowledge of E. coli, new assays are being developed or existing ones redesigned, thanks to the availability of new reporter genes and new or improved substrates. The technological evolution towards easier and more sensitive detection of different gene products is another important aspect. Often, this requires the redesign of the bacterium to make it compatible with the novel measuring tests. Recent advances in surface chemistry and nanoelectronics open the perspective for advanced reporter based on novel measuring platforms and with an online potential. In this article, we will discuss the use of E. coli-based bioreporters in ecotoxicological applications as well as some innovative sensors awaited for the future.
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65
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Saei-Dehkordi SS, Fallah AA, Nematollahi A. Arsenic and mercury in commercially valuable fish species from the Persian Gulf: influence of season and habitat. Food Chem Toxicol 2010; 48:2945-50. [PMID: 20667462 DOI: 10.1016/j.fct.2010.07.031] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2010] [Revised: 07/15/2010] [Accepted: 07/20/2010] [Indexed: 10/19/2022]
Abstract
This study was undertaken to determine the concentrations of arsenic and mercury in edible muscle of pelagic (Scomberomorus commerson, Chirocentrus dorab, Sphyraena jello, Rachycentron conadum, Thunus tonggol), benthopelagic (Trichiurus lepturus, Caranx sem, Pampus argenteus, Parastromateus niger) and demersal (Nemipterus japonicas, Epinephelus coioides, Platycephalus indicus, Psettodes erumei, Pomadasys argenteus, Acanthopagrus latus) fish species from the Persian Gulf during summer and winter. The samples were analyzed by graphite furnace atomic absorption spectrometry (GFAAS) for arsenic and cold vapor atomic absorption spectrometry (CVAAS) for mercury after wet-ashing digestion. The results were expressed as μg/g of wet weight. The resulted range of contamination in fish species was between 0.156-0.834 μg/g for arsenic; and 0.120-0.527 μg/g for mercury. Also study revealed that seasonal variation influenced the concentration of the metals in the fish samples. The highest concentration of arsenic and mercury was found in Epinephelus coioides (1.011 μg/g) and Thunus tonggol (0.548 μg/g) in winter, respectively. Moreover, demersal fish species had the highest arsenic (0.481 μg/g) and mercury (0.312 μg/g) concentrations. Our study demonstrates that estimated daily and weekly intakes of arsenic and mercury via consumption of fish flesh were far below the PTDI and PTWI values established by FAO/WHO.
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Affiliation(s)
- S Siavash Saei-Dehkordi
- Department of Food Hygiene and Quality Control, Faculty of Veterinary Medicine, Shahrekord University, Shahrekord 115, Iran.
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