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Title
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Gas chromatography-inductively coupled plasma-time-of-flight mass spectrometry as a tool for speciation analysis of organomercury compounds in environmental and biological samples
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Author
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Abstract
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| An inductively coupled plasma-time-of-flight mass spectrometer has been combined with a capillary gas chromatograph for the speciation analysis of inorganic and methylmercury. The derivatisation and volatilisation of the ionic mercury species from the sample was achieved by in-situ ethylation with sodium tetraethyl borate (NaBEt(4)) in a purge-and-trap injection (PTI) system. The potential of the ICP-TOFMS for detection of fast transient signals with peak widths significantly shorter than 1 s with high temporal fidelity and ultra-trace sensitivity was demonstrated. A thorough optimisation of the instrumental parameters led to absolute detection limits of 20 fg and 1.5 pg and relative detection limits of 2 and 150 pg l(-1) for methylmercury and inorganic mercury, respectively. The accuracy of the method was demonstrated by the analysis of two certified reference materials, a freeze dried tuna fish (CRM 464) and a dogfish muscle (DORM-2), and by recovery measurements on spiked samples. Application to ultra-trace speciation analysis of organomercury compounds in ice from the French Alps has been addressed. |
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Language
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English
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Source (journal)
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Journal of analytical atomic spectrometry. - London
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Publication
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London
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2002
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ISSN
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0267-9477
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DOI
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10.1039/B205472H
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Volume/pages
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17
:11
(2002)
, p. 1492-1497
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ISI
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000179068600005
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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