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- W2013459096 abstract "Applying an inverted voltage to the “sidekick” electrodes during ion cyclotron resonance detection improves both Fourier transform ion cyclotron resonance (FT-ICR) mass spectral signal-to-noise ratio (at fixed resolving power) and resolving power (at fixed signal-to-noise ratio). The time-domain signal duration increases by up to a factor of 2. The method has been applied to 7-T FT-ICR MS of electrosprayed positive ions from substance P and human growth hormone protein (∼22 000 Da, m/Δm50% 200 000), without the need for pulsed cooling gas inside the ICR trap. The modification can be easily adapted to any FT-ICR instrument equipped with sidekick electrodes. The present effects are shown to be comparable to electron field modification by injection of an electron beam during ICR detection, reported by Kaiser and Bruce (Kaiser, N. K.; Bruce, J. E. Anal. Chem. 2005, 77, 5973−5981.). Although the exact mechanism is not fully understood, computer simulations show that a flattening of the radial potential gradient along the magnetic field direction in the ICR trap may contribute to the effects. This study not only provides a way to enhance the quality of FT-ICR mass spectra but also offers insight into understanding of ion motions inside an ICR ion trap." @default.
- W2013459096 created "2016-06-24" @default.
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- W2013459096 date "2007-04-20" @default.
- W2013459096 modified "2023-09-25" @default.
- W2013459096 title "Modification of Trapping Potential by Inverted Sidekick Electrode Voltage during Detection To Extend Time-Domain Signal Duration for Significantly Enhanced Fourier Transform Ion Cyclotron Resonance Mass Resolution" @default.
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- W2013459096 doi "https://doi.org/10.1021/ac062016z" @default.
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