Wide-mass-range axialization for high-resolution Fourier-transform ion cyclotron resonance mass spectrometry of externally generated ions.
Ions generated in both continuous and pulsed-mode external ion sources are injected into an open-ended cylindrical Fourier-transform ion cyclotron resonance ion trap by means of an electrostatic ion guide consisting of concentric cylinder and wire electrodes to which a potential difference is applied. Broadband axialization during ion injection improves ion trapping efficiency by reducing the ion off-axis displacement. Significant improvements in both signal-to-noise ratio and mass resolving power, along with high mass selectivity are demonstrated for ions generated by external Cs+ secondary ion mass spectrometry or by matrix-assisted laser desorption/ionization.
Marto
J A
JA
Department of Chemistry, Ohio State University, Columbus.
Guan
S
S
Marshall
A G
AG
D002586:Cesium / Q000737:chemistry; D017357:Cyclotrons; D004566:Electrodes; D007834:Lasers; D013058:Mass Spectrometry / Q000295:instrumentation*; D017550:Spectroscopy, Fourier Transform Infrared
D002586:Cesium