In this research, a novel low temperature atmospheric pressure plasma generator is successfully developed. The developed plasma generator can generate uniform plasma discharge under the operating conditions of 5 SLM helium flow rate and 5 Watts RF power. The temperature of the plasma generator can be maintained lower than 75oC after 30 minutes of continuous operation. The low temperature property of the proposed plasma generator is feasible for the high temperature sensitive sample. Modify the polymer surface by using this plasma generator, for example, the polydimethylsiloxane. It is successfully improve the hydrophilic property, and the surface energy changed obviously. The result of ATR-FTIR detection, the variation of functional groups proved the hydrophilic property, too.
Being used the plasma generator to the ion source in novel mass spectrometry. Results show that the measured ion intensity generated using the proposed plasma generator increases steadily with the increases power and increases gas flow. This confirms that this plasma generator is a good ion source in mass spectrometry and for developing a Radio Frequency Direct Analysis in Real Time (RF-DART) mass spectrometry. The blown gas signals of the chewed gum, garlic, and tobacco can be detected quickly already. The signals of the volatile compounds in the solid Chinese herbs samples can be acquired, too. Mass-spectrometer detection results reveal that the developed low-temperature AP plasma generator can directly detect the sample peaks of various samples without using complicate sample preparation processes. More importantly, this proposed analysis method will not cause the memory effect which may influence the signal peaks while analyzing sequence samples during MS operation.
Keywords: Low temperature atmospheric pressure plasma; Radio Frequency Direct Analysis in Real Time(RF-DART); Mass spectrometry; Memory effect.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0912107-161426 |
| Date | 12 September 2007 |
| Creators | Hsu, Wei-jen |
| Contributors | Jen-taie Shiea, Che-hsin Lin, none, none |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0912107-161426 |
| Rights | not_available, Copyright information available at source archive |
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