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Characterization of the microwave-induced plasma as a detector for supercritical fluid chromatography. Technical report

Technical Report ·
OSTI ID:6668501
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 (CO/sub 2/ and N/sub 2/O) 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.
Research Organization:
Indiana Univ., Bloomington (USA). Dept. of Chemistry
OSTI ID:
6668501
Report Number(s):
AD-A-197709/9/XAB; INDU/DC/GMH/TR-88-30
Country of Publication:
United States
Language:
English