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Li L, Lai X, Xu X, Li J, Yuan P, Feng J, Wei L, Cheng X. Determination of bromate via the chemiluminescence generated in the sulfite and carbon quantum dot system. Mikrochim Acta 2018; 185:136. [PMID: 29594442 DOI: 10.1007/s00604-017-2653-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Accepted: 12/29/2017] [Indexed: 10/18/2022]
Abstract
The authors describe a chemiluminescence (CL)-based assay for the determination of bromate. The method is based on the use of a solution of carbon quantum dots (CQDs) and sulfite. Strong CL (peak at 490 nm) is observed when bromate is injected into the solution. The CL increases linearly in the 0.3 to 10 μmol L-1 bromate concentration range, giving a 0.1 μmol L-1 limit of detection (at an S/N ratio of 3). A possible CL mechanism is suggested that involves a redox reaction between the CQDs, bromate and sulfite in the acidic medium. This leads to the formation of hole-injected and electron-injected CQDs. Radiative recombination of oxidant-injected holes and electrons in the CQDs accounts for the occurrence of CL. This mechanism contradicts the previous assumption that the transfer of energy occurs from SO2* to the CQDs. Although nitrite may interfere in the determination of bromate, its effect can be eliminated by adding sulfamic acid. The assay is sensitive and represents a new tool for the determination of bromate, which is a carcinogen. Graphical abstract Under acidic condition, carbon quantum dots (CQDs) can react with sulfite and bromate transforming to hole-injected CQDs (CQDs•-) and electron-injected CQDs (CQDs•+), respectively. Thereafter, strong chemiluminescence (490 nm) aroused from the radiative electron-hole annihilation between CQDs•- and CQDs•+.
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Affiliation(s)
- Liping Li
- Jiangxi Province Key Laboratory of Preventive Medicine, Nanchang University, Nanchang, 330006, People's Republic of China.,School of Public Health, Nanchang University, 461 Bayi Road, Nanchang, 330006, People's Republic of China
| | - Xiaojing Lai
- Jiangxi Province Key Laboratory of Preventive Medicine, Nanchang University, Nanchang, 330006, People's Republic of China.,School of Public Health, Nanchang University, 461 Bayi Road, Nanchang, 330006, People's Republic of China
| | - Xin Xu
- Jiangxi Province Key Laboratory of Preventive Medicine, Nanchang University, Nanchang, 330006, People's Republic of China.,School of Public Health, Nanchang University, 461 Bayi Road, Nanchang, 330006, People's Republic of China
| | - Jie Li
- Jiangxi Province Key Laboratory of Preventive Medicine, Nanchang University, Nanchang, 330006, People's Republic of China.,School of Public Health, Nanchang University, 461 Bayi Road, Nanchang, 330006, People's Republic of China
| | - Ping Yuan
- Jiangxi Province Key Laboratory of Preventive Medicine, Nanchang University, Nanchang, 330006, People's Republic of China.,School of Public Health, Nanchang University, 461 Bayi Road, Nanchang, 330006, People's Republic of China
| | - Jiangao Feng
- Jiangxi Province Key Laboratory of Preventive Medicine, Nanchang University, Nanchang, 330006, People's Republic of China.,School of Public Health, Nanchang University, 461 Bayi Road, Nanchang, 330006, People's Republic of China
| | - Lijun Wei
- Jiangxi Province Key Laboratory of Preventive Medicine, Nanchang University, Nanchang, 330006, People's Republic of China. .,School of Public Health, Nanchang University, 461 Bayi Road, Nanchang, 330006, People's Republic of China.
| | - Xianglei Cheng
- Jiangxi Province Key Laboratory of Preventive Medicine, Nanchang University, Nanchang, 330006, People's Republic of China. .,School of Public Health, Nanchang University, 461 Bayi Road, Nanchang, 330006, People's Republic of China.
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Farmany A, Mortazavi SS, Hashemi E, Sahraei R. A new catalytic oxidation method for sensitive quantification of bromate in flours and bottled water using AgNPs. ENVIRONMENTAL MONITORING AND ASSESSMENT 2014; 186:1371-1375. [PMID: 24146069 DOI: 10.1007/s10661-013-3459-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Accepted: 10/01/2013] [Indexed: 06/02/2023]
Abstract
In this paper, a simple and sensitive spectrophotometric method for the determination of nanomolar level of bromate, based on the catalytic effect of silver nanoparticles on the oxidation of acid red 14 by potassium bromate, is described. The reaction rate was monitored spectrophotometrically by measuring the decrease in absorbance of acid red 14 at 516 nm. The detection limit of the method was 8 ng/mL, and the linear range was between 15 and 130 ng/mL. The effects of acidity, concentration of reactants and reaction time, and external ions were also discussed. The optimum reaction conditions were fixed, and some kinetic parameters determined. The relative standard deviation for the determination of bromate at the concentration of 50 ng/mL was calculated to be 0.996 % (n = 10). The method has been successfully applied to the determination of bromate in flours and bottled waters.
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Affiliation(s)
- Abbas Farmany
- Departments of Chemistry, Hamedan Branch, Islamic Azad University, Hamedan, Iran,
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Marák J, Staňová A, Vaváková V, Hrenáková M, Kaniansky D. On-line capillary isotachophoresis–capillary zone electrophoresis analysis of bromate in drinking waters in an automated analyzer with coupled columns and photometric detection. J Chromatogr A 2012; 1267:252-8. [DOI: 10.1016/j.chroma.2012.07.075] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Revised: 07/23/2012] [Accepted: 07/24/2012] [Indexed: 10/28/2022]
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Alsohaimi IH, Alothman ZA, Khan MR, Abdalla MA, Busquets R, Alomary AK. Determination of bromate in drinking water by ultraperformance liquid chromatography-tandem mass spectrometry. J Sep Sci 2012; 35:2538-43. [PMID: 22815069 DOI: 10.1002/jssc.201200312] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2012] [Revised: 05/15/2012] [Accepted: 05/23/2012] [Indexed: 11/11/2022]
Abstract
Bromate is a byproduct formed as a result of disinfection of bromide-containing source water with ozone or hypochlorite. The International Agency for Research on Cancer has recognized bromate as a possible human carcinogen, thus it is essential to determine in drinking water. Present work highlights a development of sensitive and fast analytical method for bromate determination in drinking water by using ultraperformance liquid chromatography-tandem mass spectrometry. The quality parameters of the developed method were established, obtaining very low limit of detection (0.01 ng/mL), repeatability and reproducibility have been found to be less than 3% in terms of relative standard deviation when analyzing a bromate standard at 0.05 μg/mL with 0.4 min analysis time. Developed method was applied for the analysis of metropolitan and bottled water from Saudi Arabia; 22 samples have been analyzed. Bromate was detected in the metropolitan water samples (from desalinization source) at concentrations ranging between 3.43 and 75.04 ng/mL and in the bottled water samples at concentrations ranging between 2.07 and 21.90 ng/mL. Moreover, in comparison to established analytical methods such as liquid chromatography-tandem mass spectrometry, the proposed method was found to be very sensitive, selective and rapid for the routine analysis of bromate at low level in drinking water.
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Affiliation(s)
- Ibrahim Hotan Alsohaimi
- Advanced Materials Research Chair, Department of Chemistry, College of Science, King Saud University, Riyadh, Kingdom of Saudi Arabia
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Feng Q, Wanigasekara E, Breitbach ZS, Armstrong DW. Separation of multiply charged anions by capillary electrophoresis using alkyl phosphonium pairing agents. Electrophoresis 2012; 33:1153-61. [DOI: 10.1002/elps.201100500] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Qing Feng
- Department of Chemistry and Biochemistry; The University of Texas at Arlington; Arlington; TX; USA
| | - Eranda Wanigasekara
- Department of Chemistry and Biochemistry; The University of Texas at Arlington; Arlington; TX; USA
| | - Zachary S. Breitbach
- Department of Chemistry and Biochemistry; The University of Texas at Arlington; Arlington; TX; USA
| | - Daniel W. Armstrong
- Department of Chemistry and Biochemistry; The University of Texas at Arlington; Arlington; TX; USA
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