Triolein-water partition coefficient coefficients

Einally, LDPE SPMDs with grass carp lipid were exposed for 21 d to 14C-2,2, 5,5 -TCB, 14c-3,3, 4,4 -TCB, i c-mirex and i c-fenvalerate, whereas SPMDs with triolein or lecithin were exposed to only " C-2,2, 5,5 -TCB. After 21 d, the largest mass fraction of these test chemicals ( " C-mirex was an exception) was in the triolein. The C-2,2, 5,5 -TCB log triolein-water partition coefficient was 6.01, whereas the " C-2,2, 5,5 -TCB partition coefficients for the grass carp lipid-water and lecithin-water systems were 30% and 35% lower, respectively. Comparison of these data to literature log AlowS of 2,2, 5,5 -TCB showed that the partition coefficients for the grass-carp lipid and the lecithin were not significantly different from median values reported for the log ATow of " C-2,2, 5,5 -TCB. However, the partition coefficient of 2,2, 5,5 -TCB in triolein and water in direct... 

Figure 5.22 Correlation of the lipid-normalized bioconcentration factors (BCF) from different species with the triglyceride (triolein)-water partition coefficient (kt ). [Reproduced with permission. J. A. Smith, P. J. Witkowski, and C. T. Chiou, Partition of nonionic compounds in aquatic systems Rev. Environ. Contain. Toxicol. 103, 127. Copyright 1988, Springer-Verlag.]...

Adopted from the original reference, from Mackay et al. (1992a), or from US EPA (2003), in order of availability. 1. Calculated from LDPE-water partition coefficients (Reynolds et al, 1990) and triolein-water partition coefficients (Chiou, 1985) 2. Huckins et al. (1999) 3. Huckins et al. (2002a) 4. Booij et al. (2003) 5. Huckins et al. (2004). 

Calculated from LDPE-water partition coefficiaits (Lefkovitzetal., 1996) and triolein-water partition coefficients (Chiou, 1985) 2. Huckins et al. (2002a) 3. Booij et al. (2003). 

Based on thermodynamic arguments, it has been suggested that octanol does not accurately represents fish lipids [81]. Lipid solubility has been proposed as an additional parameter based on the argument that lipids are more structured than octanol [82]. Partition coefficients with other solvents (triolein-water) and membrane vesicles are measured and related to as well as to BCF [32, 83, 84]. In general, these latter partition coefficients fairly correlate with Kq with systematic lower values at high These differences may lead to an apparently lower BCR The consequences are that overestimates bioaccumulation for very hydrophobic compounds. 

Niimi, A.J. Solubility of Organic Chemicals in Octanol, Triolein and Cod Liver Oil and Relationships between Solubility and Partition Coefficients, Water Res., 25(12) 1515-1521 (1991). 

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