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Applicability of head space solid phase microextraction (HS-SPME) with polyethylene glycol (PEG) fibre for GC-MS determination of volatile fatty acids in aqueous samples
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Resumo(s)
A method consisting of head-space solid phase micro extraction (HS-SPME)
followed by gas chromatography coupled with mass spectrometry (GC-MS) was
developed for determination of volatile fatty acids in wastewater. A new fibre
polyethylene glycol (PEG) was evaluated for the sample preparation. This fibre is
designed to show high sample capacity, faster mass transfer during extraction, shorter
equilibrium times and faster desorption process. The developed method showed good
sensitivity with comparable limit of detection (LOD) and limit of quantitation (LOQ)
values. The selection of various parameters included extraction time, extraction
temperature, sample volume and desorption conditions. The experimental results
showed low detection limits ranging between 0.01 mg/L to 0.06 mg/L for different
acids. The new fibre was found to be efficient towards acetic and propionic acid.
Descrição
Palavras-chave
HS-SPME PEG GC-MS Polyethylene glycol