Vredenbregt MJ ,
Londo M ,
Visser T ,
Jong APJM de
22 p
in Dutch
1993
Toon Nederlands
English Abstract A study has been carried out on the applicability of
cryotrapping gas chromatography-Fourier Transform infrared spectrometry
(GC-FTIR) for the identification and isomer discrimination of polycyclic
aromatic hydrocarbons (PAHs). Method development has been performed by
means of a standard mixture of 24 PAHs of the series from naphthalene to
benzo(ghi)perylene. All compounds including structural isomers have been
identified on the basis of spectral differences. Detection limits were
established as 250-500 picogram per microliter injected on-column. The
applicability of the method has been tested on the analysis of sediment,
soil and river clay extracts, which had been analysed previously by means of
HPLC with fluorescence detection. The presence of the majority of the PAHs
was unequivocally confirmed while previously undetermined PAHs could be
identified. Moreover essential additional information was obtained on the
identity of two coeluting structural isomers. As such cryotrapping GC-FTIR
forms an important additional tool in the analysis of PAHs by means of
GC-FID, GC-MSD and HPLC with fluorescense detection. Cryotrapping spectra
of PAH appear to be quite similar to conventionally recorded spectra.
Absorption frequencies are found within the data point resolution although
minor intensity differences may occur. For that reason existing
interpretation and library search systems remain useful for structural
elucidation.
