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Determination of mercury(II) in water samples using dispersive liquid-liquid microextraction and back extraction along with capillary zone electrophoresis

文献类型：期刊论文

作者Li, Jinhua1; Lu, Wenhui1,2; Ma, Jiping2; Chen, Lingxin1
刊名MICROCHIMICA ACTA
出版日期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
ISSN号0026-3672
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
文献子类Article
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%.
学科主题Chemistry
URL标识查看原文
WOS关键词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
WOS研究方向Chemistry
语种英语
WOS记录号WOS:000296924800012
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]
公开日期2012-03-06
源URL[http://ir.yic.ac.cn/handle/133337/5337]  
专题烟台海岸带研究所_山东省海岸带环境工程技术研究中心
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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来源：烟台海岸带研究所

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