Data correlation in on-line solid-phase extraction-gas chromatography-atomic emission/mass spectrometric detection of unknown microcontaminants |
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Authors: | Th Hankemeier J Rozenbrand M Abhadur J J Vreuls U A Th Brinkman |
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Institution: | (1) Department of Analytical Chemistry, Free University, De Boelelaan 1083, 1081 HV Amsterdam, the Netherlands;(2) Present address: TNO Institute for Nutrition and Food Reserch, Analytical Sciences Division, Utrechtseweg 48, 3704 HE Zeist, The Netherlands |
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Abstract: | Summary A procedure is described for the (non-target) screening of hetero-atom-containing compounds in tap and waste water by correlating
data obtained by gas chromatography (GC) using atomic emission (AED) and mass selective (MS) detection. Solid-phase extraction
(SPE) was coupled on-line to both GC systems to enable the determination of microcontaminants at the 0.02–1 μg L−1 level in 7–50 mL of aqueous sample. The screening was limited to compounds present in at least one heteroatom-selective GC-AED
trace above a predetermined concentration level. These compounds were identified by their partial formulae (AED) and the corresponding
mass spectra, which were obtained from the GC-MS chromatogram via the retention index concept. The potential of the approach
was demonstrated by the identification of target compounds as well as all unknowns present in tap and waste water above the
predetermined threshold of 0.05 μg L−1 (tap water) or 0.5 μg L−1 (waste water). |
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Keywords: | Gas chromatography Atomic emission and MS detection Solid-phase extraction Aqueous samples |
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