| Determination of mercury(II) in water samples using dispersive liquid-liquid microextraction and back extraction along with capillary zone electrophoresis | |
Li, Jinhua1 ; Lu, Wenhui1,2; Ma, Jiping2; Chen, Lingxin1
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| 发表期刊 | MICROCHIMICA ACTA
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| ISSN | 0026-3672 |
| 2011-12-01 | |
| 卷号 | 175期号:3-4页码:301-308 |
| 关键词 | Back Extraction Capillary Zone Electrophoresis Dispersive Liquid-liquid Microextraction Mercury Water Samples |
| 产权排序 | [Li, Jinhua; Lu, Wenhui; Chen, Lingxin] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Shandong Prov Key Lab Coastal Zone Environm Proc, Key Lab Coastal Zone Environm Proc,CAS, Yantai 264003, Peoples R China; [Lu, Wenhui; Ma, Jiping] Qingdao Technol Univ, Inst Environm Municipal Engn, Key Lab Environm Engn Shandong Prov, Qingdao 266033, Peoples R China |
| 通讯作者 | Chen, LX (reprint author), Chinese Acad Sci, Yantai Inst Coastal Zone Res, Shandong Prov Key Lab Coastal Zone Environm Proc, Key Lab Coastal Zone Environm Proc,CAS, Yantai 264003, Peoples R China |
| 作者部门 | 环境化学实验室 |
| 英文摘要 | We have developed a method for the determination of mercury in water samples that combines dispersive liquid-liquid microextraction (DLLME) with back-extraction (BE) and detection by capillary zone electrophoresis. DLLME is found to be a simple, cost-effective and rapid method for extraction and preconcentration. The BE procedure is based on the fact that the stability constant of the hydrophilic chelate of Hg(II) with L-cysteine is much larger than that of the respective complex with 1-(2-pyridylazo)-2-naphthol. Factors affecting complex formation and extraction efficiency (such as pH value, concentration of the chelating agent, time of ultrasonication and extraction, and type and quantity of disperser solvent) were optimized. Under the optimal conditions, the enrichment factor is 625, and the limit of detection is 0.62 mu g L(-1). The calibration plot is linear in the range between 1 and 1,000 mu g L(-1) (R (2) = 0.9991), and the relative standard deviation (RSD, for n = 6) is 4.1%. Recoveries were determined with tap water and seawater spiked at levels of 10 and 100 mu g L(-1), respectively, and ranged from 86.6% to 95.1%, with corresponding RSDs of 3.95-5.90%.; We have developed a method for the determination of mercury in water samples that combines dispersive liquid-liquid microextraction (DLLME) with back-extraction (BE) and detection by capillary zone electrophoresis. DLLME is found to be a simple, cost-effective and rapid method for extraction and preconcentration. The BE procedure is based on the fact that the stability constant of the hydrophilic chelate of Hg(II) with L-cysteine is much larger than that of the respective complex with 1-(2-pyridylazo)-2-naphthol. Factors affecting complex formation and extraction efficiency (such as pH value, concentration of the chelating agent, time of ultrasonication and extraction, and type and quantity of disperser solvent) were optimized. Under the optimal conditions, the enrichment factor is 625, and the limit of detection is 0.62 mu g L(-1). The calibration plot is linear in the range between 1 and 1,000 mu g L(-1) (R (2) = 0.9991), and the relative standard deviation (RSD, for n = 6) is 4.1%. Recoveries were determined with tap water and seawater spiked at levels of 10 and 100 mu g L(-1), respectively, and ranged from 86.6% to 95.1%, with corresponding RSDs of 3.95-5.90%. |
| 文章类型 | Article |
| 资助机构 | National Natural Science Foundation of China[20975089]; Chinese Academy of Sciences[KZCX2-EW-206]; Department of Science and Technology of Shandong Province of China[2008GG20005005]; Natural Science Foundation of Shandong Province of China[ZR2010BQ027]; Science and technology support project of Qingdao Public domain[09-1-1-55-nsh]; Yantai Research and Development Program of China[2010158] |
| 收录类别 | SCI |
| 语种 | 英语 |
| 关键词[WOS] | ATOMIC FLUORESCENCE SPECTROMETRY ; PLASMA-MASS SPECTROMETRY ; CLOUD POINT EXTRACTION ; OPTICAL EMISSION-SPECTROMETRY ; SOLID-PHASE MICROEXTRACTION ; ELECTRON-CAPTURE DETECTION ; SPECIATION ANALYSIS ; ABSORPTION-SPECTROMETRY ; IONIC LIQUID ; BIOLOGICAL SAMPLES |
| 研究领域[WOS] | Chemistry |
| WOS记录号 | WOS:000296924800012 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.yic.ac.cn/handle/133337/5336 |
| 专题 | 中国科学院海岸带环境过程与生态修复重点实验室_海岸带环境工程技术研究与发展中心 |
| 作者单位 | 1.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Shandong Prov Key Lab Coastal Zone Environm Proc, Key Lab Coastal Zone Environm Proc,CAS, Yantai 264003, Peoples R China 2.Qingdao Technol Univ, Inst Environm Municipal Engn, Key Lab Environm Engn Shandong Prov, Qingdao 266033, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Jinhua,Lu, Wenhui,Ma, Jiping,et al. Determination of mercury(II) in water samples using dispersive liquid-liquid microextraction and back extraction along with capillary zone electrophoresis[J]. MICROCHIMICA ACTA,2011,175(3-4):301-308. |
| APA | Li, Jinhua,Lu, Wenhui,Ma, Jiping,&Chen, Lingxin.(2011).Determination of mercury(II) in water samples using dispersive liquid-liquid microextraction and back extraction along with capillary zone electrophoresis.MICROCHIMICA ACTA,175(3-4),301-308. |
| MLA | Li, Jinhua,et al."Determination of mercury(II) in water samples using dispersive liquid-liquid microextraction and back extraction along with capillary zone electrophoresis".MICROCHIMICA ACTA 175.3-4(2011):301-308. |
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