title: Estimation of Koc values for deuterated benzene, toluene, and ethylbenzene, and application to ground water contamination studies.
abstract: Sorption partition coefficients between water and organic carbon (Koc) for deuterated benzene, toluene, and ethylbenzene have been estimated by measuring values of the octanol-water partition coefficient (Kow) and HPLC retention factors (k1), which correlate closely to values of Koc. Measured values of log Kow for non-deuterated and deuterated toluene are 2.77 (+/- 0.02) and 2.78 (+/- 0.04), respectively, indicating that within experimental error, log Koc for deuterated and non-deuterated toluene are the same. The HPLC method provides greater precision, and yields values of delta log Koc (= log Koc [deuterated]-log Koc [non-deuterated]) of -0.021 (+/- 0.001) for benzene, -0.028 (+/- 0.002) for toluene, and -0.035 (+/- 0.003) for ethylbenzene. The small values of delta log Koc demonstrates that deuterated compounds are excellent tracers for the hydrologic behavior of ground water contaminants.
authors.affiliation: Dept. of Geology & Geophysics, University of Wyoming, Laramie 82070, USA.
authors.forename: S R
authors.initials: SR
authors.lastname: Poulson
authors.forename: J I
authors.initials: JI
authors.lastname: Drever
authors.forename: P J
authors.initials: PJ
authors.lastname: Colberg
mesh_terms: D001554:Benzene / Q000032:analysis* / Q000737:chemistry; D001555:Benzene Derivatives / Q000032:analysis* / Q000737:chemistry; D002851:Chromatography, High Pressure Liquid; D003362:Cost-Benefit Analysis; D003903:Deuterium; D005618:Fresh Water / Q000032:analysis*; D011786:Quality Control; D014050:Toluene / Q000032:analysis* / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D001555:Benzene Derivatives; D014874:Water Pollutants, Chemical; D014050:Toluene; D003903:Deuterium; D001554:Benzene; C004912:ethylbenzene