Kansas Water Science Center
USGS Water Science Centers are located in each state. |
Automated Solid-Phase Extraction of Herbicides from Water for Gas Chromatography-Mass Spectrometric AnalysisBy M.T. Meyer, M.S. Mills, and E.M. Thurman AbstractAn automated solid-phase extraction (SPE) method was developed for the pre-concentration of chloroacetanilide and triazine herbicides, and two triazine metabolites from 100-ml water samples. Breakthrough experiments for the C18 SPE cartridge show that the two triazine metabolites are not fully retained and that increasing flow-rate decreases their retention. Standard curve r2 values of 0.998-1.000 for each compound were consistently obtained and a quantitation level of 0.05 Îg/l was achieved for each compound tested. More than 10,000 surface and ground water samples have been analyzed by this method. Additional information about the Organic Geochemistry Research Laboratory can be found at: http://ks.water.usgs.gov/studies/reslab/Meyer, M.T., Mills, M.S., and Thurman, E.M., 1993, Automated solid-phase extraction of herbicides from water for gas chromatography-mass spectrometric analysis [abst.]: Journal of Chromatography, v. 629, p. 55-59. To request a paper copy of this journal article, email: scribner@.usgs.gov |