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Estimation of the octanol-water partition coefficients of PAHs by solid-phase microextraction

Wang, Y.; Wang, X.; Lee, F.S.

Se Pu 17(5): 424-426

1999

ISSN/ISBN: 1000-8713
PMID: 12552873
Document Number: 501024
Eleven PAHs were analyzed by solid-phase microextraction-gas chromatography/ion trap detector and their partition coefficients were obtained at equilibrium. When the polymer coating of the fiber may be viewed as one kind of organic solvent, the linear free energy relationship between the polydimethylsiloxane-water partition coefficient (Ksw) and octanol-water partition coefficient (Kow) was established by solid-phase microextraction, which was log Ksw = 0.9318 log Kow-0.2056 with good correlation coefficient 0.9504. The linear equation may be used to estimate the octanol-water partition coefficient of other PAHs and similar H acceptors compounds. Being compared with Leo's method which was based on the additive-constitutive nature of the partition coefficient, the solid-phase microextraction method may distinguish efficiently Kow of the isomer.

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