Studies on Solvent Extraction Method for Separation of PCBs and PAHs in Mineral oil Waste oil and their Estimation by GC MS

Abstract

Contemporary trends in analytical chemistry are towards the newlinesimplification and compactness of sample preparation, as well as the newlineminimization of organic solvent uses. In view of this, several novel newlineextraction techniques have been developed in order to reduce the analyses newlinestep, increase the sample throughput and to improve the quality and the newlinesensitivity of analytical methods. One of the emerging technique is solidphase newlineextraction (SPE). The solid-phase extraction method has been newlinedeveloped for the determination of nine polychlorinated biphenyl (PCBs) newlineand sixteen polycyclic aromatic hydrocarbons (PAHs) by gas newlinechromatography with mass spectrometry confirmation in mineral newlineoil/waste oil and river water samples. The efficiency of SPE of these newlinePCBs and PAHs was compared with those obtained by solvent extraction newline(liquid-liquid extraction). newlineWater pollution presents a very critical problem facing developing newlinecountries. The environmental monitoring of the contaminants seems newlinenecessary to understand their sources and impacts. Among a wide variety newlineof organic pollutants present in water, PCBs and PAHs are of particular newlineimportance as widespread, persistent, and toxic contaminants. They are newlineusually present at trace levels in the aquatic surfaces; therefore their newlinedetection and control require selective and sensitive analytical newlineprocedures. The solid-phase extraction (SPE) followed by the gaschromatography newlinecoupled to mass spectrometry (GC-MS) are the most newlinecommonly used techniques for their analyses in water. Thesis objectives newlineare focused on the development of new analytical methods for the newlineextraction and analyses of these two families of pollutants present in newlinesurface water.The water samples were studied from Godavari River, newlineNanded, Maharahtra. The new method showed practical environmental newlineand economical advantages in terms of sample preparation time, newlinesimplicity, reduction in solvent use, and cost and is particularly suitable newlinefor routine applications requiring a high sample throughput. newline