Inductively coupled plasma/ion trap mass spectrometry for elemental/isotopic analysis
- Pacific Northwest Lab., Richland, WA (United States)
This presentation extends last year`s report of the first combination of an inductively coupled plasma (CP) and an ion trap mass spectrometer (ITMS). This combination is though to potentially yield better sensitivity, higher mass resolution, MS/MS, and collisonally induced dissociation of unwanted polyatomic ions. To prevent the large argon ion currents from entering the trap and quickly filling it to the space charge limit a linear quadrupole was placed between the vacuum interface ion optics and the ion trap entrance optics. This linear quadrupole could be operated in RF only, RF/DC, and RF notch filter modes. Although the argon ion beam could be successfully {open_quotes}notched-out,{close_quotes}, it was found that the argon ion beam was being attenuated by some other process, possibly Auger neutralization. In traditional ICP/MS the argon ion beam is so intense that it is by far the most intense ion and is typically skipped during the scan, however when transferred to the ion trap it produced peak intensities similar to analyte signals from 100 ng/mL or less solutions. Thus, the linear quad may not be necessary.
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 61890
- Report Number(s):
- CONF-9405234--
- Country of Publication:
- United States
- Language:
- English
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