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A novel HS‐SBSE system coupled with gas chromatography and mass spectrometry for the analysis of organochlorine pesticides in water samples
Author(s) -
Grossi Paula,
Olivares Igor R. B.,
de Freitas Diego R.,
Lancas Fernando M.
Publication year - 2008
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.200800338
Subject(s) - chromatography , mass spectrometry , chemistry , gas chromatography , pesticide , gas chromatography–mass spectrometry , organochlorine pesticide , environmental chemistry , agronomy , biology
A methodology to analyze organochlorine pesticides (OCPs) in water samples has been accomplished by using headspace stir bar sorptive extraction (HS‐SBSE). The bars were in house coated with a thick film of PDMS in order to properly work in the headspace mode. Sampling was done by a novel HS‐SBSE system whereas the analysis was performed by capillary GC coupled mass spectrometric detection (HS‐SBSE‐GC‐MS). The extraction optimization, using different experimental parameters has been established by a standard equilibrium time of 120 min at 85°C. A mixture of ACN/toluene as back extraction solvent promoted a good performance to remove the OCPs sorbed in the bar. Reproducibility between 2.1 and 14.8% and linearity between 0.96 and 1.0 were obtained for pesticides spiked in a linear range between 5 and 17 ng/g in water samples during the bar evaluation.