Determination of mercury species in sea-water by liquid chromatography with inductively coupled plasma mass spectrometric detection

Autor:	Martin J. Bloxham, Anthony Gachanja, Steve J. Hill, Paul J. Worsfold
Rok vydání:	1996
Předmět:	Detection limit Chromatography Elution chemistry.chemical_element Mass spectrometry Chloride Analytical Chemistry Mercury (element) chemistry.chemical_compound chemistry medicine Inductively coupled plasma Inductively coupled plasma mass spectrometry Ammonium acetate Spectroscopy medicine.drug
Zdroj:	Journal of Analytical Atomic Spectrometry. 11:145
ISSN:	1364-5544 0267-9477
DOI:	10.1039/ja9961100145
Popis:	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.
Databáze:	OpenAIRE
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