Fundamental Study and Development of Oscillating Plasma Glow Discharge GC Detectors

✍ Scribed by Dae Y. Maeng; Sun Y. You; Byung C. Cha; Hasuck Kim; Hyo J. Kim

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 466 KB
• Volume: 55
• Category: Article
• ISSN: 0026-265X
• DOI: 10.1006/mchj.1996.1303

✦ Synopsis

Plasma oscillations in glow discharges are developed as a detector for gas chromatography. To investigate the range of useful operating conditions and to study the mechanisms, the effects of experimental parameters on plasma oscillation have been investigated. This study includes the variation of discharge current, voltage, pressure and discharge gap. Frequency ranges of 10 KHz to 10 MHz have been observed with various shapes of oscillations. Two kinds of modes of oscillations are observed with the variation of electrode gap at low pressure and low voltage. One is the oscillation in a normal glow discharge with a positive column and the other is in a discharge without a positive column, obtained by decreasing the distance between the anode and cathode. Plasma oscillations without the positive column show more sensitive changes and higher frequency than that of the normal glow discharge. However, the chromatogram could not be obtained because of noise.