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
2011-12-01
Source PublicationMICROCHIMICA ACTA
ISSN0026-3672
Volume175Issue:3-4Pages:301-308
Contribution Rank[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
AbstractWe 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%.
Corresponding AuthorChen, 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
KeywordBack Extraction Capillary Zone Electrophoresis Dispersive Liquid-liquid Microextraction Mercury Water Samples
Department环境化学实验室 
Subject AreaChemistry
Funding OrganizationNational 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]
URL查看原文
Indexed BySCI
WOS KeywordATOMIC 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
SubtypeArticle
Language英语
WOS Research AreaChemistry
WOS IDWOS:000296924800012
Citation statistics
Document Type期刊论文
Identifierhttp://ir.yic.ac.cn/handle/133337/5336
Collection中科院海岸带环境过程与生态修复重点实验室_环境化学实验室
Affiliation1.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
First Author AffilicationYantai Institute of Coastal Zone Research, Chinese Academy of Sciences
Recommended Citation
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.
Files in This Item: Download All
File Name/Size DocType Version Access License
Determination of mer(229KB) 开放获取--View Download
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Li, Jinhua]'s Articles
[Lu, Wenhui]'s Articles
[Ma, Jiping]'s Articles
Baidu academic
Similar articles in Baidu academic
[Li, Jinhua]'s Articles
[Lu, Wenhui]'s Articles
[Ma, Jiping]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Li, Jinhua]'s Articles
[Lu, Wenhui]'s Articles
[Ma, Jiping]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: Determination of mercury(II) in water samples using dispersive liquid-liquid microextraction and back extraction along with capillary zone electrophoresis.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.