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Analysis of PCBs in soils and sediments by microwave-assisted extraction, headspace-SPME and high resolution gas chromatography with ion-trap tandem mass spectrometry
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Orientador(es)
Resumo(s)
A procedure for the determination of seven indicator PCBs in soils and sediments using
microwave-assisted extraction (MAE) and headspace solid-phase microextraction
(HS-SPME) prior to GC-MS/MS is described. Optimization of the HS-SPME was carried
out for the most important parameters such as extraction time, sample volume and
temperature. The adopted methodology has reduced consumption of organic solvents and
analysis runtime. Under the optimized conditions, the method detection limit ranged from
0.6 to 1 ng/g when 5 g of sample was extracted, the precision on real samples ranged from
4 to 21% and the recovery from 69 to 104%. The proposed method, which included the
analysis of a certified reference material in its validation procedure, can be extended
to several other PCBs and used in the monitoring of soil or sediments for the presence
of PCBs.
Descrição
Palavras-chave
Microwave-assisted extraction Solid-phase microextraction Polychlorinated biphenyls Soil Sediments
Contexto Educativo
Citação
Editora
Taylor & Francis