Gas chromatography of dioxins and chlorinated pesticides in water samples has been performed after adsorption from 50 to 100 mL sample on to a cartridge containing 100 mg cyanopropyl-bonded porous silica. The dioxins and chlorinated pesticides were desorbed with 2 mL carbon disulfide, which is concentrated and analysed by gas chromatography coupled with an electron-capture detector. The average recovery of 0.20 ng mL-1 of each chlorinated pesticide and of 0.50 ng mL-1 of each dioxin from distilled water and river water samples (50 mL) is 97.2% with a standard deviation (SD) 2.6. In the dioxin separation from chlorinated pesticides the recovery of dioxins at levels of 0.1–0.5 ng mL-1 is 97.9% with a SD 1.3, with traces of aldrin, heptachlorepoxide and 4,40-DDD (1.7%) by the CN-Sep-Pak cartridge, while the recovery of chlorinated pesticides at levels of 0.05–0.2 ng mL-1 is 97.4% with a SD 1.5, with traces of hep-dioxin (2.4%) and penta-dioxin (1.0%) by the C18-Sep-Pak cartridge connected ‘‘in series’’ to the CN-Sep-Pak cartridge.

Gas chromatography of dioxins and chlorinated pesticides in water samples has been performed after adsorption from 50 to 100 mL sample on to a cartridge containing 100 mg cyanopropyl-bonded porous silica. The dioxins and chlorinated pesticides were desorbed with 2 mL carbon disulfide, which is concentrated and analysed by gas chromatography coupled with an electron-capture detector. The average recovery of 0.20 ng mL-1of each chlorinated pesticide and of 0.50 ng mL-1of each dioxin from distilled water and river water samples (50 mL) is ≥97.2% with a standard deviation (SD) ≤ 2.6. In the dioxin separation from chlorinated pesticides the recovery of dioxins at levels of 0.1-0.5 ng mL-1is ≥97.9% with a SD ≤ 1.3, with traces of aldrin, heptachlorepoxide and 4,47grave;-DDD (≤1.7%) by the CN-Sep-Pak cartridge, while the recovery of chlorinated pesticides at levels of 0.05-0.2 ng mL-1is ≥97.4% with a SD ≤ 1.5, with traces of hep-dioxin (2.4%) and penta-dioxin (1.0%) by the C18-Sep-Pak cartridge connected "in series" to the CN-Sep-Pak cartridge. © 2009 Vieweg+Teubner / GWV Fachverlage GmbH.

Cyanopropyl Bonded-Phase Cartridges for Traces Enrichment of Dioxins and Chlorinated Pesticides from Water Samples

RUSSO, Mario Vincenzo;AVINO P;
2009

Abstract

Gas chromatography of dioxins and chlorinated pesticides in water samples has been performed after adsorption from 50 to 100 mL sample on to a cartridge containing 100 mg cyanopropyl-bonded porous silica. The dioxins and chlorinated pesticides were desorbed with 2 mL carbon disulfide, which is concentrated and analysed by gas chromatography coupled with an electron-capture detector. The average recovery of 0.20 ng mL-1 of each chlorinated pesticide and of 0.50 ng mL-1 of each dioxin from distilled water and river water samples (50 mL) is 97.2% with a standard deviation (SD) 2.6. In the dioxin separation from chlorinated pesticides the recovery of dioxins at levels of 0.1–0.5 ng mL-1 is 97.9% with a SD 1.3, with traces of aldrin, heptachlorepoxide and 4,40-DDD (1.7%) by the CN-Sep-Pak cartridge, while the recovery of chlorinated pesticides at levels of 0.05–0.2 ng mL-1 is 97.4% with a SD 1.5, with traces of hep-dioxin (2.4%) and penta-dioxin (1.0%) by the C18-Sep-Pak cartridge connected ‘‘in series’’ to the CN-Sep-Pak cartridge.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11695/3462
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