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Speciation analysis of mercury in water samples by dispersive liquid-liquid microextraction coupled to capillary electrophoresis

文献类型：期刊论文

作者Yang, Fangfang1,2; Li, Jinhua2; Lu, Wenhui2; Wen, Yingying2; Cai, Xiaoqiang1,2; You, Jinmao1; Ma, Jiping3; Ding, Yangjun1; Chen, Lingxin1,2
刊名ELECTROPHORESIS
出版日期2014-02-01
卷号35期号:4页码:474-481
关键词Capillary electrophoresis Dispersive liquid-liquid microextraction Mercury speciation Water sample
ISSN号0173-0835
产权排序[Yang, Fangfang; Cai, Xiaoqiang; You, Jinmao; Ding, Yangjun; Chen, Lingxin] Qufu Normal Univ, Coll Chem & Chem Engn, Qufu, Peoples R China; [Yang, Fangfang; Li, Jinhua; Lu, Wenhui; Wen, Yingying; Cai, Xiaoqiang; Chen, Lingxin] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai, Peoples R China; [Ma, Jiping] Qingdao Technol Univ, Inst Environm & Municipal Engn, Key Lab Environm Engn Shandong Prov, Qingdao, Peoples R China
通讯作者Chen, LX (reprint author), Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai, Peoples R China. lxchen@yic.ac.cn
中文摘要In this study, a method of pretreatment and speciation analysis of mercury by dispersive liquid-liquid microextraction along with CE was developed. The method was based on the fact that mercury species including methylmercury (MeHg), ethylmercury (EtHg), phenylmercury (PhHg), and Hg(II) were complexed with 1-(2-pyridylazo)-2-naphthol to form hydrophobic chelates and l-cysteine could displace 1-(2-pyridylazo)-2-naphthol to form hydrophilic chelates with the four mercury species. Factors affecting complex formation and extraction efficiency, such as pH value, type, and volume of extractive solvent and disperser solvent, concentration of the chelating agent, ultrasonic time, and buffer solution were investigated. Under the optimal conditions, the enrichment factors were 102, 118, 547, and 46, and the LODs were 1.79, 1.62, 0.23, and 1.50 g/L for MeHg, EtHg, PhHg, and Hg(II), respectively. Method precisions (RSD, n = 5) were in the range of 0.29-0.54% for migration time, and 3.08-7.80% for peak area. Satisfactory recoveries ranging from 82.38 to 98.76% were obtained with seawater, lake, and tap water samples spiked at three concentration levels, respectively, with RSD (n = 5) of 1.98-7.18%. This method was demonstrated to be simple, convenient, rapid, cost-effective, and environmentally benign, and could be used as an ideal alternative to existing methods for analyzing trace residues of mercury species in water samples.
英文摘要In this study, a method of pretreatment and speciation analysis of mercury by dispersive liquid-liquid microextraction along with CE was developed. The method was based on the fact that mercury species including methylmercury (MeHg), ethylmercury (EtHg), phenylmercury (PhHg), and Hg(II) were complexed with 1-(2-pyridylazo)-2-naphthol to form hydrophobic chelates and l-cysteine could displace 1-(2-pyridylazo)-2-naphthol to form hydrophilic chelates with the four mercury species. Factors affecting complex formation and extraction efficiency, such as pH value, type, and volume of extractive solvent and disperser solvent, concentration of the chelating agent, ultrasonic time, and buffer solution were investigated. Under the optimal conditions, the enrichment factors were 102, 118, 547, and 46, and the LODs were 1.79, 1.62, 0.23, and 1.50 g/L for MeHg, EtHg, PhHg, and Hg(II), respectively. Method precisions (RSD, n = 5) were in the range of 0.29-0.54% for migration time, and 3.08-7.80% for peak area. Satisfactory recoveries ranging from 82.38 to 98.76% were obtained with seawater, lake, and tap water samples spiked at three concentration levels, respectively, with RSD (n = 5) of 1.98-7.18%. This method was demonstrated to be simple, convenient, rapid, cost-effective, and environmentally benign, and could be used as an ideal alternative to existing methods for analyzing trace residues of mercury species in water samples.
学科主题Biochemical Research Methods ; Chemistry, Analytical
研究领域[WOS]Biochemistry & Molecular Biology ; Chemistry
关键词[WOS]ATOMIC FLUORESCENCE SPECTROMETRY ; CLOUD POINT EXTRACTION ; CHROMATOGRAPHY-MASS SPECTROMETRY ; SOLID-PHASE EXTRACTION ; IONIC LIQUID ; ELECTROCHEMICAL DETECTION ; INORGANIC MERCURY ; ORGANIC MERCURY ; PRECONCENTRATION ; METHYLMERCURY
收录类别SCI
资助信息National Natural Science Foundation of China [21275158, 21107057, 21275089]; Innovation Projects of the Chinese Academy of Sciences [KZCX2-EW-206]; 100 Talents Program of the Chinese Academy of Sciences
原文出处http://dx.doi.org/10.1002/elps.201300409
语种英语
WOS记录号WOS:000331957300003
公开日期2014-07-08
源URL[http://ir.yic.ac.cn/handle/133337/6905]  
专题烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
作者单位1.Qufu Normal Univ, Coll Chem & Chem Engn, Qufu, Peoples R China
2.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai, Peoples R China
3.Qingdao Technol Univ, Inst Environm & Municipal Engn, Key Lab Environm Engn Shandong Prov, Qingdao, Peoples R China
推荐引用方式
GB/T 7714		 Yang, Fangfang,Li, Jinhua,Lu, Wenhui,et al. Speciation analysis of mercury in water samples by dispersive liquid-liquid microextraction coupled to capillary electrophoresis[J]. ELECTROPHORESIS,2014,35(4):474-481.
APA Yang, Fangfang.,Li, Jinhua.,Lu, Wenhui.,Wen, Yingying.,Cai, Xiaoqiang.,...&Chen, Lingxin.(2014).Speciation analysis of mercury in water samples by dispersive liquid-liquid microextraction coupled to capillary electrophoresis.ELECTROPHORESIS,35(4),474-481.
MLA Yang, Fangfang,et al."Speciation analysis of mercury in water samples by dispersive liquid-liquid microextraction coupled to capillary electrophoresis".ELECTROPHORESIS 35.4(2014):474-481.

入库方式： OAI收割

来源：烟台海岸带研究所

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