Title: Alternate extraction and clean-up for CALUX® analyses of feeds and feed components

Auteur(s): Archer JC ; Mobley RJ ; Shojaee S ; Pence LM ; Earnheart C ;  ; 

Year: 2003

Journal: Organohalogen Compounds

Subject(s): alternate extraction ; CALUX ; clean-up ; feed ; POPs ; food ; bioassay ; TEQ ;  ; 

Summary: Foodstuffs of animal origin contribute approximately 80% of the human exposure to Persistent Organic Pollutants (POPs), while the majority of the animals' burden comes mainly from feeds!. Since dietary intake has been identified as the primary source of exposure to POPs, the production of quick results when testing for them is of utmost importance in the food and feed industries. Of particular concern with the feed industry is that feed products can be used quite quickly and a random surveillance program results in only a snapshot of feeds that are on hand at the time of collection. Consequently, many feed lots escape surveillance and elevated POPs levels may go undetected.Routine, rapid screening of the feed supplies could significantly reduce costly discoveries at a much later date. The CALUX@ bioassay is one screening technique that can be used to gather TEQ data for a large number of samples in a relatively short period of time. Sample prioritization for GC/HRMS analyses is facilitated by data obtained from using the CALUX® screening method. If elevated TEQs are detected, then congener specific information by traditional GC/HRMS analyses becomes crucial in identifying the POPs source. The congener data are also needed for risk assessment purposes and the building of geographical databases.