PARENT SESSION
PS19 - Bioavailability
Sunday, 17 November 2002
8:00 AM to 6:30 PM
Exhibit Hall

(P169) Distribution of Bioavailablility of Tin in Fish and Water at a Portland Harbor, Oregon Superfund Site.

Anderson, Kim¹, Krissanakriangkrai, Oraphin^*,1, Johnson, Eugene¹, ¹ Oregon State University, Corvallis, Oregon, USA

ABSTRACT- Butyltin compounds have been shown to be a potent immunosuppressant even at concentration of 1g/L or less. They are mainly used as an antifouling agent in ship bottom paints and constituent of plastic stabilizer. The pollution caused by butyltin compounds is widespread in coastal areas. Therefore, International Maritime Organization is planning a global ban on the use of marine anti-fouling paints containing tributyltin from 2003. Humans can be exposed to butyltin compounds from eating fish, clams and other seafood. This study was to determine bioavailability of tin compounds in water compare to tin in fish at Portland harbor superfund site. Diffusion gel thin film (DGT) is used to determine bioavailability of tin in water. Total tin was analyzed in fish including Small Mouth Bass, Black Crappie, and Carp by digesting with acid followed by anodic stripping voltammetry (ASV). Concentration of tin in fish was compared with the bioavailable tin from water collected by the DGT. The concentration of other bioavailable metal species such as cadmium, mercury, lead, zinc, and copper collected by the DGT were compared from site to site. In conclusion concentration of total tin and other metals in fish and total bioavailable tin in water are associated.

Key words: Portland Harbor, Butyltin Compounds, Bioavailability, Diffusion gel thin film (DGT)