Capillary gas chromatography coupled with microplasma mass spectrometry - Improved ion source design compatible with bench-top mass spectrometric instrumentation
Research output: Contribution to journal › Journal article › Research › peer-review
Capillary gas chromatography was performed with mass spectrometric detection using a novel microplasma ion source for operation in an element- selective mode. The ion source was a 350 kHz radio frequency helium plasma, which was sustained inside the 4 cm end of a 0.32 mm i.d. fused silica capillary column, and located inside the high vacuum chamber of the quadrupole mass spectrometer. Due to the low volume of the ion source, a stable low pressure discharge was produced utilizing only the 2.25 mL min- 1 of GC carrier gas (helium) for plasma support. Small amounts of oxygen (0.1-0.2% v/v) were added to the plasma gas in order to prevent carbon deposits and to enhance signal-to-noise ratios. Chlorine and bromine were selectively detected at the 5-20 pg s-1 level (S/N = 2), and both produced a response that was linear within 3 orders of magnitude.
Original language | English |
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Journal | HRC Journal of High Resolution Chromatography |
Volume | 21 |
Issue number | 5 |
Pages (from-to) | 282-286 |
Number of pages | 5 |
ISSN | 0935-6304 |
DOIs | |
Publication status | Published - 1 Jan 1998 |
- Capillary gas chromatography, Element-selective detection, Microplasma mass spectrometry, Radio frequency plasma
Research areas
ID: 231655287