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The combination of headspace–solid phase microextraction (HS–SPME) and gas chromatography–inductively coupled plasma mass spectrometry (GC–ICPMS) was evaluated for the determination of volatile selenium metabolites in normal urine samples, i.e. without selenium supplementation. HS–SPME operating conditions were optimised and a sampling time of 10min was found to be suitable for simultaneous extraction...
The development and validation of a method for organotin analysis in soils, including butyl-, phenyl- and octyltins, are described in this study. The influence of pretreatment step based on sample lyophilisation was first studied. Different solid–liquid extraction techniques including mechanical stirring (MSAE), accelerated solvent (ASE), microwave (MAE) and ultrasound (UAE), were compared. MSAE gave...
This paper focuses on the analytical performance improvement of the coupled technique HPLC–ICPMS using on-line collision/reaction cell technology for selenium elemental and speciation analyses at the ng (Se) l −1 level in aquatic environment. Collision/reaction cell operating parameters were optimised, resulting in selected conditions of 5.5mlmin −1 H 2 and 0.5mlmin −1...
The optimisation of ICPMS collision/reaction cell conditions for the simultaneous analysis of arsenic and selenium is described. A mixture of 3.8mLmin −1 of H 2 and 0.5mLmin −1 of He was found to be suitable for the removal of both ArAr + and ArCl + interferences. Detection limits down to 30ng (element) L −1 in total analysis, and between 81 and 230ng...
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