Authors:
Barbu, Luminita; Teaca, Emilia
Barbu, Luminita; Teaca, Emilia
Conference: International Symposium “The Environment and the Industry”
Date: October 29-30, 2013
Location: Bucharest, Romania
Published: 2013
Volume: II
Keywords:
Organochlorine pesticides
Gas chromatography
Mass spectrometry
Organochlorine pesticides
Gas chromatography
Mass spectrometry
Abstract:
In this paper we studied operating parameters to determine the optimal conditions for separation and concentration of organochlorine pesticides in aqueous samples using solid phase microextraction coupled with gas chromatography – mass spectrometry. Several parameters affecting extraction, viz. extraction mode, incubation time and temperature, stirring speed, extraction time, desorption time, bake out time and temperature, vial penetration were investigated. In our experiments we used polydimethylsiloxane 100 µm fibers at the extraction temperature of 85 °C for 10 minutes and desorption temperature of 250 °C for 3 minutes. Under these optimal conditions, the proposed solid phase microextraction method provided good linearity in the ranges of 0.5-1000 ng/mL organochlorine pesticides. The recoveries of pesticides in water samples exceeded 85%.
In this paper we studied operating parameters to determine the optimal conditions for separation and concentration of organochlorine pesticides in aqueous samples using solid phase microextraction coupled with gas chromatography – mass spectrometry. Several parameters affecting extraction, viz. extraction mode, incubation time and temperature, stirring speed, extraction time, desorption time, bake out time and temperature, vial penetration were investigated. In our experiments we used polydimethylsiloxane 100 µm fibers at the extraction temperature of 85 °C for 10 minutes and desorption temperature of 250 °C for 3 minutes. Under these optimal conditions, the proposed solid phase microextraction method provided good linearity in the ranges of 0.5-1000 ng/mL organochlorine pesticides. The recoveries of pesticides in water samples exceeded 85%.