Journal
ANALYTICA CHIMICA ACTA
Volume 796, Issue -, Pages 7-13Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2013.08.017
Keywords
Mercury speciation; Anion exchange chromatography; Inductively coupled plasma mass spectrometry; Fish
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Funding
- National Natural Science Foundation of China [21275038, 21075110]
- Program for Changjiang Scholars and Innovative Research Team in Chinese University [IRT 1231]
- Project of Zhejiang Key Scientific and Technological Innovation Team [2010R50017]
- Scientific Research Foundation of Hangzhou Normal University for Young Teachers [PD13002004]
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This work demonstrated the feasibility of mercury speciation analysis by anion exchange chromatographic separation with inductively coupled plasma mass spectrometry detection. For the first time, by complexing with the mobile phase containing 3-mercapto-1-propanesulfonate into negatively charged complexes, fast separation of inorganic mercury (Hg2+), monomethylmercury (MeHg), ethylmercury (EtHg) and phenylmercury (PhHg) was achieved within 5 min on a 12.5-mm strong anion exchange column. The detection limits for Hg2+, MeHg, EtHg and PhHg were 0.008, 0.024, 0.029 and 0.034 mu g L-1, respectively. The relative standard deviations of peak height and peak area (5.0 mu g L-1 for each Hg species) were all below 3%. The determined contents of Hg2+, MeHg and total Hg in a certified reference material of fish tissue by the proposed method were in good accordance with the certified values with satisfactory recoveries. The relative errors for determining MeHg and total mercury were -2.4% and -1.2%, respectively, with an acceptable range for spike recoveries of 94-101%. Mercury speciation in 11 fish samples were then analyzed after the pretreated procedure. The mercury contents in all fish samples analyzed were found compliant with the criteria of the National Standards of China. (C) 2013 Elsevier B.V. All rights reserved.
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