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Development and validation of a novel method for the analysis of chlorinated pesticides in soils using microwave-assisted extraction–headspace solid phase microextraction and gas chromatography–tandem mass spectrometry
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Orientador(es)
Resumo(s)
A new procedure for determining eleven organochlorine
pesticides in soils using microwave-assisted extraction
(MAE) and headspace solid phase microextraction
(HS-SPME) is described. The studied pesticides consisted of
mirex, α- and γ-chlordane, p,p’-DDT, heptachlor, heptachlor
epoxide isomer A, γ-hexachlorocyclohexane, dieldrin, endrin,
aldrine and hexachlorobenzene. The HS-SPME was
optimized for the most important parameters such as extraction
time, sample volume and temperature. The present
analytical procedure requires a reduced volume of organic
solvents and avoids the need for extract clean-up steps. For
optimized conditions the limits of detection for the method
ranged from 0.02 to 3.6 ng/g, intermediate precision ranged
from 14 to 36% (as CV%), and the recovery from 8 up to
51%. The proposed methodology can be used in the rapid
screening of soil for the presence of the selected pesticides,
and was applied to landfill soil samples.
Descrição
Palavras-chave
Microwave-assisted extraction Solid phase microextraction Chlorinated pesticides Extraction methods Landfill soil
Contexto Educativo
Citação
Editora
Springer-Verlag