Solid phase microextraction for the determination of chromium in sea-water

László Abrankó, Lu Yang, Ralph E. Sturgeon, Péter Fodor, Zoltán Mester

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Application of solid phase microextraction (SPME) to the extraction of Cr from sea-water after derivatization with the β-diketonate ligand 1,1,1-trifluoro-2,4-pentadione (trifluoroacetylacetone) is reported. The chelation reaction was conducted in a single (aqueous) phase medium. Both liquid phase and headspace extraction were studied by employing a 100 μm PDMS (polydimethylsiloxane) coated SPME fiber. Capillary gas chromatography (GC) coupled to electron capture detection (ECD), electron impact-mass spectrometry (EI-MS) and inductively coupled plasma-mass spectrometry (ICP-MS) were compared for the quantitation of Cr. Except for the ECD, isotope dilution calibration was applied, using 53Cr enriched spikes. Detection limits between 0.011-0.015 ng ml-1 (as Cr) were achieved with all three systems. Accuracy was assessed using CASS-4 Nearshore Seawater Certified Reference Material (CRM) from the National Research Council of Canada (NRCC). The developed method provided accurate results with EI-MS and ICP-MS detection, while significant bias was experienced with the ECD.

Original languageEnglish
Pages (from-to)1098-1103
Number of pages6
JournalJournal of analytical atomic spectrometry
Volume19
Issue number9
DOIs
Publication statusPublished - Sep 1 2004

ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy

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