Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Inductively Coupled Argon Plasma as an Ion Source for Mass Spectrometric Determination of Trace Elements.
Author Houk, Robert S. ; Fassel, Velmer A. ; Flesch, Gerald D. ; Svec, Harry J. ; Gray, Alan L. ;
CORP Author Iowa State Univ., Ames.;Environmental Research Lab., Athens, GA.
Year Published 1980
Report Number W-7405-eng-82; EPA-600/J-80-216;
Stock Number PB81-165193
Additional Subjects Mass spectroscopy ; Trace elements ; Chemical analysis ; Laboratory equipment ; Isotopes ; Argon compounds ; Water ; Heavy water ; Oxygen ; Nitrogen oxides ; Solutions ; Reprints ; Plasma spectroscopy ; Hydroxyl radical
Library Call Number Additional Info Location Last
NTIS  PB81-165193 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 9p
Solution aerosols are injected into an inductively coupled argon plasma (ICP) to generate a relatively high number density of positive ions derived from elemental constituents. A small fraction of these ions is extracted through a sampling orifice into a differentially pumped vacuum system housing an ion lens and quadrupole mass spectrometer. The positive ion mass spectrum obtained during nebulization of a typical solvent (1 percent HNO3 in H2O) consists mainly of ArH(+), Ar(+), H3O(+), H2O(+), NO(+), O2(+), HO(+), Ar2(+), Ar2H(+), and Ar(+2). The mass spectra of the trace elements studied consist principally of singly charged monatomic (M+) or oxide (MO+) ions in the correct relative isotopic abundances. Analytical calibration curves obtained in an integration mode show a working range covering nearly 4 orders of magnitude with detection limits of 0.002-0.06 microgram per milliliter for those elements studied. This approach offers a direct means of performing trace elemental and isotopic determinations on solutions by mass spectrometry.