Concentrations of polychlorinated naphthalene (PCN) congeners were measured in domestic animal-related samples such as feed ingredients, mixed feed and animal fat. Mean concentrations of total PCNs in feed ingredients ranged from 500 to 1500 pg g-1 lipid wt with a high concentration found in fish meal. Total PCN concentrations were similar among mixed feeds and ranged from 98 to 110 pg g-1 lipid wt. The total PCN concentration in chickens was more than twice the concentration in pigs. Tetra-CNs were the predominant homologues in all samples. Biomagnifications of higher chlorinated PCN congeners, especially penta- and hexa-CNs, were a few folds greater in chickens than in pigs. The estimated concentrations of 2,3,7,8-tetrachloro dibenzo-p-dioxin equivalents (TEQs) of some selected PCNs in feed ingredients, mixed feeds, chickens and pigs were 0.008 to 0.063, 0.001 to 0.002, 0.033 and 0.011 pg g-1 lipid wt, respectively.
(Safety Research Team, TEL +81-28-838-7822)
Reference:
- Guruge et al. (2004) J. Environ. Monit. 6:753-757.
- Guruge et al. (2005) Chemosphere. 58:883-889.
