Intercomparison study for the determination of selected polychlorinated biphenyls (PCBs) in feed matrices

Analytical methodology currently employed for the determination of seven indicator PCBs in three compound feeds and fish meal has been evaluated in a collaborative study. The majority of the obtained relative standard deviations of the PCBs varied from 20 to 30%. On assuming a target relative standard deviation of 22% for the analytical results, statistical evaluation showed that about 80% of the participating laboratories delivered data within...