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Detection and quantitation of trace levels of low molecular weight halocarbons (LMHs) associated with commercial sodium humate |
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| Authors: | K V Gabbita J Y Callaway V L Vilker M E Comba |
| Institution: | 1. Department of Chemical Engineering and National Center for Intermedia Transport Research , University of California , Los Angeles, CA, 90024, U.S.A.;2. Environmental Contaminants Division, National Water Research Institute , Canada Centre for Inland Waters , Ontario, Burlington, Ontario, L7R 4A6, Canada |
| Abstract: | Examination of vapor above commercial sodium humate and above 10wt% aqueous humate solution by gas chromatography (GC) revealed the presence of chloroform and trichloroethylene. Further examination of the aqueous humate by the purge and trap procedure confirmed the association of chloroform and trichloroethylene with the humate. GC/mass spectrometry analyses of methylene chloride extract of the humate established the association of LMHs with the humate. Improved headspace capillary GC technique showed that the humate contained not only chloroform, trichloroethylene but several other LMHs in the range 190 to 4000ng·kg‐1. |
| Keywords: | Environmental pollution metal compounds soil pollution plant uptake analytical chemistry bioavailability multiple linear regression soil‐plant system |