We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Evaluation of log K ow and tissue lipid content as predictors of chemical partitioning to fish tissues
- Authors
Hoffman, A. D.; Nichols, J. W.; Gallinat, C. A.; Elonen, C. M.; Bertelsen, S. L.
- Abstract
In vitro equilibrium chemical partition coefficients were determinedfor six chemicals in selected tissues from four species of fish. Log-transformed values were then regressed in stepwise fashion against chemical log octanol/water partition coefficient (Kow) and the log of tissue lipid content to derive a series of linear one- andtwo-variable models. Equations derived for fat indicate that n-octanol is a good surrogate for nonpolar lipid in the range of chemical log Kow tested (1.46 < log Kow < 4.04). These equations also support the conclusion that previously developed Kow-bioconcentration factor relationships are largely a reflectionof chemical accumulation in fat. Fitted slope and intercept terms for 'lean' tissues differed from those expected from chemical partitioning to lipid only and were instead consistent with the suggestion that partitioning to nonlipid-nonwater cellular constituents contributessubstantially to chemical accumulation. A general equation is presented for prediction of tissue/water and blood/water partitioning from chemical log Kow and tissue (or blood) lipid content. It is suggested, however, that tissue- and blood-specific equations be used to estimate the tissue/blood partitioning relationships needed forkinetic modeling efforts.
- Subjects
MODELING (Sculpture)
- Publication
Environmental Toxicology & Chemistry, 1998, Vol 17, Issue 8, p1447
- ISSN
0730-7268
- Publication type
Article