Development of an Atmospheric Pressure Glow Discharge Detector for Capillary Column Gas Chromatography |
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| Authors: | Hyo J Kim Young A Woo Jong S Kang Susanna S Anderson Edward H Piepmeier |
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| Institution: | (1) Department of Pharmacy, Dongduk Women’s University, Seoul, Korea, KR;(2) Department of Pharmacy, Chung Nam National University, Dajeon, Korea, KR;(3) Department of Chemistry, Oregon State University, Corvallis, OR, USA, US |
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| Abstract: | The use of the change in the oscillation frequency of the current of a new atmospheric helium glow discharge for sensitive
signal detection for gas chromatography is studied. The effluent of a capillary column is directed into the glow discharge
cell perpendicular to the axis of the glow discharge that existed between a platinum anode and cathode. A stable discharge
is obtained when several hundred volts are applied between the 0.2-mm gap between the anode and cathode. The effects of the
electrode gap, discharge voltage and gas flow rate on the baseline frequency and discharge current were investigated. The
chromatogram shows that the discharge current and discharge gap have a strong influence on the detector response. The discharge
current shows positive peaks; however, frequency peaks are positive or negative depending on the discharge conditions. The
response of the detector is in the femto-mole and pico-mole range for nonane and decane.
Received August 5, 1997. Revision September 2, 1999 |
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| Keywords: | : Gas chromatographic detector high-pressure glow discharge plasma oscillation |
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