A novel HS-SBSE system coupled with gas chromatography and mass spectrometry for the analysis of organochlorine pesticides in water samples.
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 degrees 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.
Laboratory of Chromatography, Institute of Chemistry at Sao Carlos, University of Sao Paulo, Sao Carlos, Brazil.
Paula
P
Grossi
Igor R B
IR
Olivares
Diego R
DR
de Freitas
Fernando M
FM
Lancas
D000818:Animals; D002849:Chromatography, Gas / Q000295:instrumentation / Q000379:methods; D006801:Humans; D006843:Hydrocarbons, Chlorinated / Q000032:analysis*; D013058:Mass Spectrometry / Q000295:instrumentation / Q000379:methods; D010575:Pesticides / Q000032:analysis*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012997:Solvents; D014881:Water Supply
D006843:Hydrocarbons, Chlorinated; D010575:Pesticides; D012997:Solvents