Accession Number:

ADA051178

Title:

Atomic Emission Spectrometry of Trace Metals Using a New Kind of Microwave-Induced Helium Plasma at Atmospheric Pressure,

Descriptive Note:

Corporate Author:

INDIANA UNIV BLOOMINGTON DEPT OF CHEMISTRY

Personal Author(s):

Report Date:

1978-02-01

Pagination or Media Count:

24.0

Abstract:

A recently described resonant cavity for generating microwave-induced helium plasmas mips at atmospheric pressure has been evaluated for use in the emission spectrometric determination of metallic elements, and has been found to offer several advantages over alternative designs. The new cavity allows self-ignition of an atmospheric pressure helium MIP. In addition, the plasma which is formed exhibits significantly improved operational stability and is considerably less susceptible to injected aerosol samples. The helium MIP was used in conjunction with a single-shot microarc sample atomizer. With this combination, analytical calibration curves for Zn, Pb, Mn, Mg, Cu, Ca, and Na are linear over 2 to 5 orders of magnitude of concentration also, detection limits for these elements are equal to or better than those obtainable with other MIPs. As with most MIPs, the ionization of easily ionized elements must either be overcome using ionization suppressants or exploited through use of ion emission lines. Interference from refractory elements is lower than exhibited by most MIPs. Author

Subject Categories:

  • Metallurgy and Metallography
  • Test Facilities, Equipment and Methods
  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE