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Determination of volatile fatty acids in municipal wastewater by gas chromatography-mass spectrometry preceded by headspace- solid phase microextraction with PDMS-CAR fibre
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Orientador(es)
Resumo(s)
An analytical procedure based on headspace – solid phase microextraction (HS-SPME)
followed by gas chromatography-mass spectrometry (GC-MS) has been developed for
the determination of free volatile fatty acids in municipal wastewater samples.
Polydimethylsiloxane-Carboxen (PDMS-CAR) fibre was found to have greater affinity
to extract lower chain fatty acids. Extraction and gas chromatographic parameters of
importance such as desorption time, sample volume, amount of salt to be added and
extraction time have been optimized. Detection limits were in the low to medium mg/L
levels. To evaluate the applicability of the developed HS-SPME procedure on real
samples, municipal wastewater treatment plant samples were analysed.
Descrição
Palavras-chave
Headspace-solid phase microextraction Municipal wastewater VFAs