{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,6]],"date-time":"2026-05-06T03:19:59Z","timestamp":1778037599451,"version":"3.51.4"},"reference-count":39,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2013,11,29]],"date-time":"2013-11-29T00:00:00Z","timestamp":1385683200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Electrophoresis"],"published-print":{"date-parts":[[2014,2]]},"abstract":"<jats:p>In this study, a method of pretreatment and speciation analysis of mercury by dispersive liquid\u2013liquid 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\u2010(2\u2010pyridylazo)\u20102\u2010naphthol to form hydrophobic chelates and <jats:sc>l<\/jats:sc>\u2010cysteine could displace 1\u2010(2\u2010pyridylazo)\u20102\u2010naphthol 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 \u03bcg\/L for MeHg, EtHg, PhHg, and Hg(II), respectively. Method precisions (RSD, <jats:italic>n<\/jats:italic> = 5) were in the range of 0.29\u20130.54% for migration time, and 3.08\u20137.80% 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 (<jats:italic>n<\/jats:italic> = 5) of 1.98\u20137.18%. This method was demonstrated to be simple, convenient, rapid, cost\u2010effective, and environmentally benign, and could be used as an ideal alternative to existing methods for analyzing trace residues of mercury species in water samples.<\/jats:p>","DOI":"10.1002\/elps.201300409","type":"journal-article","created":{"date-parts":[[2013,10,26]],"date-time":"2013-10-26T08:36:38Z","timestamp":1382776598000},"page":"474-481","source":"Crossref","is-referenced-by-count":48,"title":["Speciation analysis of mercury in water samples by dispersive liquid\u2013liquid microextraction coupled to capillary electrophoresis"],"prefix":"10.1002","volume":"35","author":[{"given":"Fangfang","family":"Yang","sequence":"first","affiliation":[{"name":"College of Chemistry and Chemical Engineering Qufu Normal University  Qufu P. R. China"},{"name":"Key Laboratory of Coastal Environmental Processes and Ecological Remediation Yantai Institute of Coastal Zone Research Chinese Academy of Sciences  Yantai P. R. 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