Resumo

LOPEZ-GRIMAU, V.; GUADAYOL, J. M.; GRIERA, J. A.  e  GUTIERREZ, M. C.. Determination of non halogenated solvents in industrial wastewater using solid phase microextiraction (SPME) and GC-MS. Lat. Am. appl. res. [online]. 2006, vol.36, n.1, pp.49-55. ISSN 0327-0793.

Solid phase microextraction (SPME) was applied to the analysis of a selected group of non halogenated solvents -all of them classified as volatile organic compounds (VOCs)- that may be present in diverse industrial wastewaters. Two different fibres (100-PDMS and 85-PA) were selected as SPME adsorbents. The extracted volatile organic compounds were analysed by high resolution gas chromatography coupled to mass spectrometry (GC-MS), following the EPA method 624. Calibration curves and method deletion limits obtained for these solvents using the two SPME fibres are reported. The 100-PDMS fibre provided better sensitivity, but the saturation was reached at a lower concentration than 85-PA fibre. The first fibre (100-PDMS) was applied to the analysis of several textile wastewaters. The method detection limits obtained with this fibre were: 0.1-0.3 μ/L for ethylbenzene m-xylene p-xylene toluene and diisobutyl ketone. In addition SPME and Headspace (HS) detection limits were compared.

Palavras-chave : Solid Phase Microextraction (SPME); Gas Chromatography-Mass Spectrometrometry (GC-MS); Wastewater; Industrial Solvents; VOCs.

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