Title
Gas chromatography-inductively coupled plasma-time-of-flight mass spectrometry as a tool for speciation analysis of organomercury compounds in environmental and biological samples Gas chromatography-inductively coupled plasma-time-of-flight mass spectrometry as a tool for speciation analysis of organomercury compounds in environmental and biological samples
Author
Faculty/Department
Faculty of Sciences. Chemistry
Publication type
article
Publication
London ,
Subject
Chemistry
Source (journal)
Journal of analytical atomic spectrometry. - London
Volume/pages
17(2002) :11 , p. 1492-1497
ISSN
0267-9477
ISI
000179068600005
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
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.
E-info
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