Mass peak shape improvement of a quadrupole mass filter when operating with a rectangular wave power supply |
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| Authors: | Chan Luo Dan Jiang Chuan‐Fan Ding Nikolai V Konenkov |
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| Institution: | 1. Department of Chemistry, Fudan University, Shanghai 200433, China;2. Ryazan State Pedagogical University, Department of General Physics, Svoboda str. 46, Ryazan, Russian Federation 390000 |
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| Abstract: | Numeric experiments were performed to study the first and second stability regions and find the optimal configurations of a quadrupole mass filter constructed of circular quadrupole rods with a rectangular wave power supply. The ion transmission contours were calculated using ion trajectory simulations. For the first stability region, the optimal rod set configuration and the ratio r/r0 is 1.110–1.115; for the second stability region, it is 1.128–1.130. Low‐frequency direct current (DC) modulation with the parameters of m = 0.04–0.16 and ν = ω/Ω = 1/8–1/14 improves the mass peak shape of the circular rod quadrupole mass filter at the optimal r/r0 ratio of 1.130. The amplitude modulation does not improve mass peak shape. Copyright © 2009 John Wiley & Sons, Ltd. |
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