Record Display for the EPA National Library Catalog

RECORD NUMBER: 616 OF 1146

OLS Field Name OLS Field Data
Main Title Performance evaluation of particle beam liquid chromatography/mass spectrometry for the measurement of acid herbicides {microfiche}
Author Pace, Chris M. ; Miller, D. A. ; Roby, M. R.
Other Authors
Author Title of a Work
Miller, Dennis A.
Roby, Mark R
CORP Author Lockheed Engineering and Sciences Co., Inc., Las Vegas, NV.;Environmental Monitoring Systems Lab., Las Vegas, NV.
Publisher U.S. Environmental Protection Agency, Quality Assurance and Methods Development Division, Environmental Monitoring Systems Laboratory,
Year Published 1990
Report Number EPA-68-03-3249; EPA/600/4-90/022
Stock Number PB90-270547
Subjects Chromatographic analysis
Additional Subjects Herbicides ; Mass spectroscopy ; Quantitative analysis ; Graphs(Charts) ; Tables(Data) ; Performance evaluation ; Spectrum analysis ; Liquid chromatography ; Phenoxyacetic acids ; Feasibility studies
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB90-270547 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 01/01/1988
Collation 1 v. (various pagings) ; 28 cm.
Abstract
Particle beam liquid chromatography/mass spectrometry (LC/MS) was evaluated for the measurement of acid herbicides. An acetic acid/ammonium acetate/methanol solvent system with a C-8 reversed phase column gave baseline resolution of all target analytes. Detection limits in the full scan mode were 100 ng to 500 ng for most of the target analytes. Dalapon and dinoseb were not detected. Response curves over the range 200 microg to 2000 microg were non-linear for most of the analytes. Response factors tended to increase with increasing analyte concentration. Mass spectra were variable and exhibited abundant ions corresponding to 'thermal' decomposition mechanisms. Spectral appearance was dependent on analyte concentration, source conditions, and source temperature. Only spectra acquired at high concentration were library matchable. Therefore, a rugged and reliable method to identify and quantify acid herbicides in environmental samples based on particle beam LC/MS technology does not appear feasible at this time.
Notes
"EPA/600/4-90/022"--cover. "EPA Contract No. 68-03-3249" "FINAL REPORT" "Technical monitor, L.D. Betowski." Includes bibliographical references.