Monofluorinated polycyclic aromatic hydrocarbons as internal standards to monitor trace enrichment and desorption of their parent compounds during solid-phase extraction
G. Luthe et al., Monofluorinated polycyclic aromatic hydrocarbons as internal standards to monitor trace enrichment and desorption of their parent compounds during solid-phase extraction, J CHROMAT A, 933(1-2), 2001, pp. 27-35
Solid-phase extraction (SPE) is an established sample-preparation technique
for clean-up procedures of polycyclic aromatic hydrocarbons (PAHs). The su
itability of monofluorinated polycyclic aromatic hydrocarbons (F-PAHs) as a
novel set of internal standards, was tested for two widely used SPE sorben
ts, octyl-bonded silica and styrene-divinylbenzene copolymer. The elution p
rofiles of eight F-PAHs and their parent PAHs, taken from the priority poll
utant list of the US-Environmental Protection Agency, were compared for dem
ineralized water and waste water. In both instances, the match of the eluti
on profiles was exceptionally close. The eight F-PAHs and the corresponding
PAHs were determined by reversed-phase liquid chromatography using acetoni
trile-water gradient elution with UV detection at 254 am. The UV spectra of
the F-PAHs show a small bathochromic shift compared with the parent PAHs.
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