Premium
Microsecond pulsed glow discharge time‐of‐flight mass spectrometer
Author(s) -
Hang Wei,
Yang Pengyuan,
Wang Xiaoru,
Yang Chenglong,
Su Yongxuan,
Huang Benli
Publication year - 1994
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.1290080804
Subject(s) - microsecond , chemistry , ion , mass spectrometry , glow discharge , quadrupole mass analyzer , time of flight mass spectrometry , time of flight , atomic physics , ion source , acceleration , pulse (music) , kinetic energy , analytical chemistry (journal) , plasma , ionization , voltage , optics , physics , organic chemistry , chromatography , quantum mechanics , classical mechanics
A linear time‐of‐flight mass spectrometer (TOFMS) has been designed, constructed, and coupled with a glow discharge source in microsecond pulsed mode (MSPGD). Orthogonal acceleration, a DC quadrupole and deflecting pulse techniques are used to diminish kinetic distribution and the spatial distribution of ions, and for deflecting Ar + ions in their flight path. Comparison was made in the same discharge source between MSPGD and DC discharge. The continuous ion current is only 0.2 nA in the DC discharge mode, while the peak ion current reaches over 100 nA in the MSPGD mode. In addition, the ratio of the repelled ions to total ions is much higher in MSPGD than with a DC discharge in TOFMS. The mechanism of MSPGD is discussed. A resolving power of 500 was achieved, which is excellent for elemental analysis. To the authors' knowledge, this is the first time that a MSPGD‐TOFMS combination has been described. The system is now being further optimized to improve its performance.