Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Dissolved Oxygen and Methane in Water By a GC Headspace Equilibration Technique.
Author Kampbell, D. H. ; Wilson., J. T. ;
CORP Author Robert S. Kerr Environmental Research Lab., Ada, OK. ;NSI Technology Services Corp., Ada, OK.
Publisher c1989
Year Published 1989
Report Number EPA/600/J-89/186;
Stock Number PB90-138454
Additional Subjects Methane ; Water analysis ; Ground water ; Aromatic hydrocarbons ; Gas chromatography ; Aquifers ; Sample preparation ; Experimental design ; Henrys law ; Reprints ; Dissolved oxygen ; Water pollution detection ; Headspace equilibration technique
Library Call Number Additional Info Location Last
NTIS  PB90-138454 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/15/1990
Collation 11p
An analytical procedure is described for the determination of dissolved oxygen and methane in groundwater samples. The method consists of generating a helium gas headspace in a water filled bottle, and analysis of the headspace by gas chromatography. Other permanent gases such as nitrogen, and volatile aliphatic hydrocarbons such as ethane, propane, and butane could also be analyzed. BTX analyses could also be done on the sample. Detection limit for oxygen was 0.1 mg/1 and 0.002 mg/1 for methane. Good agreement was shown between Winkler titration and the GC-Headspace Equilibration Technique for oxygen analyses by a linear regression coefficient, R(sup 2)=0.998. Oxygen was greatly depleted in some field samples when they were stored for 30 days at 4 C without hydrochloric acid preservation. (Copyright (c) 1989 Gordon and Breach, Science Publishers, Inc.)