Determination of mercury species in sea-water by liquid chromatography with inductively coupled plasma mass spectrometric detection
- 1 January 1996
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of Analytical Atomic Spectrometry
- Vol. 11 (2) , 145-148
- https://doi.org/10.1039/ja9961100145
Abstract
A liquid chromatographic method coupled with inductively coupled plasma mass spectrometry for the speciation of methylmercury chloride, mercury(II) chloride and ethylmercury chloride in sea-water is described. The three species were eluted from a C18 column (150 × 3.2 mm id) at 260, 340 and 750 s, respectively, with a mobile phase of 1% v/v acetonitrile and 0.005% 2-mercaptoethanol in 0.06 mol l–1 ammonium acetate pumped at 1.0 ml min–1. The total mercury determined in TORT-1 Lobster Hepatopancreas (350 ± 62 µg l–1) was in good agreement with the certified value (330 ± 60 µg l–1). The detection limits (3s) in artificial sea-water were 0.25 µg l–1 for methylmercury chloride and mercury(II) chloride and 0.75 µg l–1 for ethylmercury chloride. Off-line preconcentration using a dithiocarbamate (Dithiochel) resin gave detection limits (signal-to-noise ration = 2) of 16 ng l–1 for methylmercury chloride and 17 ng l–1 for mercury(II) chloride using a 50-fold preconcentration factor for a 1 I sample of synthetic sea-water.Keywords
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