期刊
JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY
卷 22, 期 1, 页码 110-117出版社
AMER CHEMICAL SOC
DOI: 10.1007/s13361-010-0005-8
关键词
Mass spectrometry; Instrumentation; Glow discharge
资金
- Pacific Northwest National Laboratory
- US Department of Energy [DE-FG02-98EF14890]
- Lilly Endowment-Indiana MetaCyt Initiative
A new instrumental concept, distance-of-flight mass spectrometry (DOFMS), is demonstrated experimentally. In DOFMS the mass-to-charge ratio of ions is determined by the distance each ion travels during a fixed time period; the mass spectrum is then recorded with a position-sensitive detector. The DOF approach provides a new way to separate and quantify components of complex samples. Initial results are demonstrated with a glow discharge ion source and a microchannel plate-phosphor screen detector assembly for atomic ion determination. This detection system demonstrated mass spectral peak widths of approximately 0.65 mm, corresponding to resolving powers of approximately 400-600 for a number of elemental samples.
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