Extraction of Organochlorine Pesticided in Animal Feed

Contaminations of animal feed by polychlorinated pesticides, like Lindane (γ-HCH) and its congeners, or DDT, are a considerable risk to human beings. Although the use of the polychlorinated pesticides was banned for several years, they are still frequently detected in fat containing material owing to their persistence, toxicology, lipophilic properties and bioaccumulation.


In order to accurately determine the accumulated polychlorinated compounds an efficient microwaveassisted extraction method was developed.


The extractions were performed with the microwave reaction system Multiwave 3000 SOLV with Rotor 8SOLV and magnetic stirring device, which is a predecessor of Multiwave 5000. Using Rotor 16SOLV MF100 with the p/T-sensor accessory and the Safety Module SOLV the method is reliably adaptable for Multiwave 5000. The determination of the investigated organochlorine pesticides was carried out by GC-MS (HewlettPackard, HP6890 and HP5973) in SIM-Mode. Calibration was accomplished by internal standardization with isotope labeled standards. 

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