Accession Number : ADA198727


Title :   The Detection of Negative Ions by Inductively Coupled Plasma-Mass Spectrometry


Descriptive Note : Technical rept.


Corporate Author : INDIANA UNIV AT BLOOMINGTON DEPT OF CHEMISTRY


Personal Author(s) : Hieftje, Gary M ; Vickers, George H ; Wilson, Daniel A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a198727.pdf


Report Date : 11 Jul 1988


Pagination or Media Count : 26


Abstract : The analytical utility of negative-ion detection is evaluated for the determination of nonmetals by inductively coupled plasma-mass spectrometry. The background spectrum is simpler than for positive ions although the baseline background level is a factor of 50 times higher. The only elemental species that can be detected with reasonable sensitivity as negative ions are the halogens. For these ions, calibration curves are linear over at least four orders of magnitude and detection limits range from 10 to 400 ng/mL. Other characteristics that are evaluated include isotope ratios, matrix effects caused by the associated cation or the anion speciation, and polyatomic-ion formation. Keywords: Plasma source mass spectrometry, Negative ions, Multielement analysis.


Descriptors :   *HALOGENS , *ANIONS , *PLASMAS(PHYSICS) , *MASS SPECTROMETRY , BASE LINES , LIMITATIONS , ISOTOPES , BACKGROUND , CALIBRATION , DETERMINATION , SPECTRA , NONMETALS , DETECTION , SOURCES , RATIOS


Subject Categories : Physical Chemistry


Distribution Statement : APPROVED FOR PUBLIC RELEASE