DETERMINATION OF EXTRACTABLE ORGANIC BROMINE AND CHLORINE IN BIOLOGICAL COMPARTMENTS OF ATLANTIC COD (GADUS-MORHUA) BY NEUTRON-ACTIVATION ANALYSIS

Tissues, eggs and bile of adult Atlantic cod raised in captivity and f ed natural food with no additional halogenated compounds of any kind w ere analyzed by neutron activation. There was a large difference in th e tissue distributions of extractable organic chlorine (EOCl) and brom ine (EOBr). Liver lipid had the lowest levels of EOBr and EOCl, of all the components investigated, and eggs had the highest levels of EOCl. Heart contained the most EOBr and EOCl per unit lipid, of the tissues . The presence of a larger proportion of EOBr than EOCl in bile sugges ts a higher rate of excretion of EOBr. The EOCl concentratios found in cod egg lipids were about 5 times higher than the highest values prev iously reported for EOCl in lipid.