PMID- 15952379
OWN - NLM
STAT- MEDLINE
DCOM- 20050912
LR  - 20190715
IS  - 0013-936X (Print)
IS  - 0013-936X (Linking)
VI  - 39
IP  - 10
DP  - 2005 May 15
TI  - Solid phase dosing and sampling technique to determine partition coefficients of 
      hydrophobic chemicals in complex matrixes.
PG  - 3736-42
AB  - Determination of polymer-water and dissolved organic carbon (DOC)-water 
      distribution coefficients of very hydrophobic chemicals (log K0w > 6) is not 
      straightforward. Poor water solubility of the test compounds complicates the 
      spiking and analysis of actual freely dissolved concentrations. By dosing a 
      system via a PDMS-fiber and monitoring the depletion in the polymer, spiking and 
      analysis of concentrations in the aqueous phase are avoided, and sorption to the 
      polymer and other hydrophobic phases can be determined easily and accurate. In 
      this publication we report the determination of poly(dimethyl-siloxane) 
      (PDMS)-water, and Aldrich humic acid-water distribution coefficients for six PAHs 
      with log K0w values varying from 4.56 to 6.85. The distribution coefficients to a 
      PDMS fiber llog Kf) and the DOC (log KDOC) range from 3.86 to 5.39 and 4.78 to 
      7.43, respectively. Even for the most hydrophobic compounds, the distribution 
      coefficients show small standard errors (< or = 0.05 log units). Therefore, this 
      method might be applied to determine sorption coefficients of numerous, even more 
      hydrophobic compounds, to humic acids as well as other dissolved hydrophobic 
      matrixes.
FAU - ter Laak, Thomas L
AU  - ter Laak TL
AD  - Institute for Risk Assessment Sciences (IRAS), Utrecht University, Yalelaan 2, 
      P.O. Box 80176, 3508 TD Utrecht, The Netherlands. t.terlaak@iras.uu.nl
FAU - Durjava, Mojca
AU  - Durjava M
FAU - Struijs, Jaap
AU  - Struijs J
FAU - Hermens, Joop L M
AU  - Hermens JL
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - Environ Sci Technol
JT  - Environmental science & technology
JID - 0213155
RN  - 0 (Dimethylpolysiloxanes)
RN  - 0 (Environmental Pollutants)
RN  - 0 (Humic Substances)
RN  - 0 (Octanols)
RN  - 0 (Polycyclic Aromatic Hydrocarbons)
RN  - 059QF0KO0R (Water)
RN  - 7440-44-0 (Carbon)
SB  - IM
MH  - Adsorption
MH  - Carbon/chemistry
MH  - Chemistry Techniques, Analytical/methods
MH  - Dimethylpolysiloxanes/*chemistry
MH  - *Environmental Pollutants
MH  - *Humic Substances
MH  - *Hydrophobic and Hydrophilic Interactions
MH  - Octanols/chemistry
MH  - Polycyclic Aromatic Hydrocarbons/*chemistry
MH  - Risk Assessment/methods
MH  - Solubility
MH  - Water/chemistry
EDAT- 2005/06/15 09:00
MHDA- 2005/09/13 09:00
CRDT- 2005/06/15 09:00
PHST- 2005/06/15 09:00 [pubmed]
PHST- 2005/09/13 09:00 [medline]
PHST- 2005/06/15 09:00 [entrez]
AID - 10.1021/es048406p [doi]
PST - ppublish
SO  - Environ Sci Technol. 2005 May 15;39(10):3736-42. doi: 10.1021/es048406p.