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Published on: September 5, 2014
Glow discharge electron impact ionization source for miniature mass spectrometers
Liang Gao1, Qingyu Song, Robert J Noll
1Bindley Biosciences Center, Discovery Park, Purdue University, West Lafayette, IN 47907, USA.
Journal of Mass Spectrometry : JMS
|April 19, 2007
Summary
A new glow discharge electron impact ionization (GDEI) source using air offers a long-lasting, low-power alternative for miniature mass spectrometers. This robust ion source is ideal for portable applications, delivering high-quality data.
Area of Science:
- Analytical Chemistry
- Mass Spectrometry Instrumentation
- Plasma Physics
Background:
- Traditional electron sources in miniature mass spectrometers often use thermoemission, which can have limitations in terms of lifespan and power consumption, especially under high-pressure conditions.
- Developing alternative ionization sources is crucial for advancing portable analytical instrumentation.
- The need for robust, low-power ion sources for handheld mass spectrometers is growing.
Purpose of the Study:
- To develop and characterize a novel glow discharge electron impact ionization (GDEI) source for miniature mass spectrometers.
- To evaluate the performance of the GDEI source using air as the support gas.
- To demonstrate the suitability of the GDEI source for portable mass spectrometry applications.
Main Methods:
- Development of a glow discharge electron impact ionization (GDEI) source.
- Characterization of the GDEI source using a handheld mass spectrometer (Mini 10).
- Investigation of the effects of discharge voltage and pressure on source performance, supported by design calculations.
Main Results:
- The GDEI source demonstrated a long operational lifetime and low power consumption, outperforming traditional filament sources.
- Performance was evaluated under varying discharge voltage and pressure conditions.
- Experimental tests confirmed the source's mechanical ruggedness and data quality.
Conclusions:
- The developed GDEI source is a viable, low-power alternative for miniature mass spectrometers.
- Its characteristics, including long lifetime and robustness, make it well-suited for portable handheld mass spectrometer applications.
- The GDEI source enhances the capabilities of portable analytical devices.
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