충남 서산군 조간대에서 채집되어진 저서성 두족류 낙지(Octopus minor)에서 브롬계화합물(Polybrominated diphenyl ethers, PBDEs)을 측정하였다. 낙지 외투장과 내장에서의 PBDEs 농도 범위는 각각 29.6~109.3 ng/g lipid wt(평균53.7 ng/g lipid wt), 11.5~89.0 ng/g lipid wt(평균 48.0 ng/g lipid wt)로 나타났다. 낙지 내장에서의 PBDEs 농도는 살오징어 간에서의 농도에 비해 약 2.5배 가량 낮게 나타났으며, 퇴적물 및 이매패류 시료와 PBDEs 농도를 비교한 결과 낙지에서 상대적으로 낮은 농도를 나타내었다. PBDEs의 조성비를 보면 낙지 외투장에서는 BDE 206, 203/200이 각각 72.3%, 11.8%로 총 PBDEs 농도의 80%이상을 차지하여 nona-, octa-BDE가 외투장에서 PBDEs의 주요 화합물로 나타났으며, 낙지 내장 시료에서는 BDE 206, 47이 각각 49%, 18.3%로 상대적으로 높은 조성비를 나타내었다.
Octopus(Octopus minor), benthic cephalopod, were collected from intertidal zone in Seosan, Choongnam and analyzed for polybrominted diphenyl ethers(PBDEs). PBDEs concentrations ranged from 29 to 109 ng/g lipid wt(mean; 54 ng/g) in mantle and from 12 to 89 ng/g lipid wt(mean; 48 ng/g) in internal organ. PBDEs concentrations in octopus internal organ were lower about two times than that in common squid collected in Yellow Sea, indicating Seosan is relatively less contaminated with PBDEs. Major congener was BDE 206, occupying 72% and 49% of total PBDE concentration in mantle and in internal organ, respectively, which is very different from PBDE composition in common squid with major congeners of BDE 47 and 99. From PBDE composition, octopus seemed to concentrate higher brominated BDE rather than lower brominated BDE. This PBDE composition in octopus may be affected by sediment with extremely high contribution of deca-BDE to total PBDE concentration.
