| Abstract [eng] |
Investigation of Extraction Methods of Organochlorine Pesticides Determination of organochlorine pesticide (18) (4,4'-DDE, 4,4'-DDD, 4,4'-DDT, α-hexachlorocyclohexane (α-HCH), lindane (γ-HCH), heptachlor, aldrin, 2,4’-DDE, 2,4’-DDD, β- hexachlorocyclohexane (β-HCH), δ-hexachlorocyclohexane (δ-HCH), pentachlorobenzene, hexachlorobenzene, heptachlor exo-epoxide, heptachlor endo-epoxide, dieldrin, endrin, methoxychlor) in water was carried out by gas chromatographic method using electron capture detector and mass spectrometry detector. DLLME is a very simple and rapid method for extraction and preconcentration of organic compounds from water samples. In this method, the appropriate mixture of extraction solvent and disperser solvent are injected into the aqueous sample by syringe, rapidly. Therefore, cloudy solution is formed. After centrifuging, the extraction solvent with the analytes is sedimented in the bottom of the conical test tube. Carbon tetrachloride (20 µl) was used as an extraction solvent, acetonitrile (480 µl) was used as a disperser solvent in DLLME. For dispersive liquid liquid microextraction bromobenzene as an internal standart was used. For liquid liquid extraction and DLLME linear ranges, accuracy and detection limits were determined. The comparison of the extraction methods was carried out. It was demonstrated that the both extraction methods can be applied for real water analysis. |
