Título: Determinación de Bifenilos Policlorados (PCBs), en Suelos y Residuos Sólidos por Extracción Acelerada de Solventes y GC-MS/MS.
Título original: Determination of Polychlorinated Biphenyls (PCBs) in Soils and Solid Waste by Accelerated Solvent, Extraction and GC-MS/MS.
Autor: Fabrizio Galbiati, Thermo Fisher Scientific (Schweiz) AG, Reinach, SwitzerlandLuca Teli, Consulenze Ambientali SpA, Scanzorosciate, Italy
Pressurized Fluid Extraction, U.S. EPA Method 8082A, PCB, Inline Clean-Up, Rocket Evaporator, TSQ 8000 Triple Quadrupole GC-MS, Xcalibur, TraceFinder
To demonstrate an accelerated solvent extraction and GC-MS/MS procedure for polychlorinated biphenyls (PCB) in soils and solid waste.
Polychlorinated biphenyls (PCBs) belong to a broad family of synthetic organic chemicals known as chlorinated hydrocarbons. In the United States, PCBs were produced from 1929 until their manufacture was banned in 1979. These compounds have a range of toxicity and vary in consistency from thin, light-colored liquids to yellow or black waxy solids. Due to their non-flammability, chemical stability, high boiling point, and electrical insulating properties, PCBs were used in hundreds of industrial and commercial applications including electrical, heat transfer, and hydraulic equipment; as plasticizers in paints, plastics, and rubber products; in pigments, dyes, and carbonless copy paper; and in many other industrial applications. Techniques such as Soxhlet (U.S. EPA Method 3540), sonication (U.S. EPA Method 3550), and microwave extraction (U.S. EPA Method 3546) are presently used for the extraction of PCBs from soil prior to their analytical determination. Those techniques are, however, very labor intensive and suffer from high solvent consumption. Accelerated solvent extraction was developed to meet the new requirements for reducing solvent usage in the preparation of solid samples. With accelerated solvent extraction, extractions can be completed in very short periods of time and with minimal amounts of solvent compared to conventional sample extraction techniques such as Soxhlet and sonication. Furthermore, interferences may be extracted along with desired analytes during those conventional extraction processes. These unwanted co-extractables may interfere with analyte detection and need to be eliminated
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