Report on the Results of the ICES/IOC/OSPARCOM Intercomparison Programme on the Determination of Chlorobiphenyl Congeners in Marine Media

This report gives an account of Step 3a of the ICES/IOC/OSPARCOM Intercomparison Programme on the Determination of Chlorobiphenyl Congeners (CBs) in Marine Media. In this exercise, participants were requested to analyse six times a cod liver oil certified reference material for CBs 52, 153 and 156 in order to establish the long-term precision of such analyses in the laboratories. The concentrations of CBs 52 and 153 were certified and known to the participants.