Characterization of the Microwave-Induced Plasma as a Detector for Supercritical Fluid Chromatography

Abstract

A microwave induced plasma (MIP) sustained in helium is evaluated as an element selective detector for capillary supercritical fluid chromatography (SFC). The plasma source, a surface microwave induced plasma (surfatron), is described. Optimal plasma conditions including viewing position, helium flow rate, and applied microwave power are discussed for sulfur emission in the near-infrared spectral region. In addition, the effects of two common mobile phases (CO2 and N2O) on plasma stability, sensitivity, and spectral background from 200 nm to 1100 nm are assessed. Although the plasma was evaluated principally for use with SFC, much of the discussion is relevant to its application as a gas chromatographic detector. Keywords: Supercritical fluid chromatography; Nonmetal detection; Spectroscopic detector; Speciation; Sulfur detection.

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Document Details

Document Type
Technical Report
Publication Date
Jul 11, 1988
Accession Number
ADA197709

Entities

People

  • Debra R. Luffer
  • Gary M. Hieftje
  • Leonard J. Galante
  • Mark Selby
  • Milos Novotny

Organizations

  • Indiana University

Tags

Communities of Interest

  • Advanced Electronics
  • Biomedical
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Background Noise
  • Carbon Dioxide
  • Chemistry
  • Chromatography
  • Detection
  • Detectors
  • Discharge Tubes
  • Elements
  • Flow Rate
  • Gas Chromatography
  • Nonmetals
  • Schematic Diagrams
  • Security
  • Spectra
  • Sulfur Compounds
  • Transmission Lines
  • United States

Fields of Study

  • Physics

Readers

  • Agricultural Chemistry/Soil Science
  • Molecular Photonics/Laser Physics
  • Pulsed Power and Plasma Physics.