ArticleJournal of the American Society for Mass Spectrometry2005
Ion excitation in a linear quadrupole ion trap with an added octopole field.
Article in Journal of the American Society for Mass Spectrometry, 2005. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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Who cites it
16 citing papers in PubMed, 51 citations in OpenAlex.
- Ion parking in native mass spectrometry.The Analyst · 2024Article
- Gas-Phase Fragmentation as a Probe of G-Quadruplex Formation.Analytical chemistry · 2023Article
- Theoretical Study of Dual-Direction Dipolar Excitation of Ions in Linear Ion Traps.Journal of the American Society for Mass Spectrometry · 2016Article
- Nonlinear Ion Harmonics in the Paul Trap with Added Octopole Field: Theoretical Characterization and New Insight into Nonlinear Resonance Effect.Journal of the American Society for Mass Spectrometry · 2016Article
- Can the effective potential of a linear quadrupole be extended to values of the Mathieu parameter q up to 0.90?Journal of the American Society for Mass Spectrometry · 2013Article
- Trapping mode dipolar DC collisional activation in the RF-only ion guide of a linear ion trap/time-of-flight instrument for gaseous bio-ion declustering.Journal of mass spectrometry : JMS · 2013Article
- Boundary-activated dissociation in a low pressure linear quadrupole ion trap in the presence of nonlinear DC fields.Journal of the American Society for Mass Spectrometry · 2012Article
- Potential distribution and transmission characteristics in a curved quadrupole ion guide.Journal of the American Society for Mass Spectrometry · 2011Article
- Characteristics of stability boundary and frequency in nonlinear ion trap mass spectrometer.Journal of the American Society for Mass Spectrometry · 2010Article
- Mass analysis with islands of stability with linear quadrupoles incorporating higher order multipole fields.Journal of the American Society for Mass Spectrometry · 2010Article
- MS/MS of ions in a low pressure linear ion trap using a pulsed gas.Journal of the American Society for Mass Spectrometry · 2009Article
- Quadrupole excitation of ions in linear quadrupole ion traps with added octopole fields.Journal of the American Society for Mass Spectrometry · 2008Article
- Mass selective axial ion ejection from linear quadrupoles with added octopole fields.Journal of the American Society for Mass Spectrometry · 2008Article
- Fragmentation of ions in a low pressure linear ion trap.Journal of the American Society for Mass Spectrometry · 2007Article
- Mass analysis in islands of stability with linear quadrupoles with added octopole fields.Journal of the American Society for Mass Spectrometry · 2007Article
- Linear quadrupoles with added hexapole fields.Journal of the American Society for Mass Spectrometry · 2006Article
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Authors and funding
5 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Modeling of ion motion and experimental investigations of ion excitation in a linear quadrupole trap with a 4% added octopole field are described. The results are compared with those obtained with a conventional round rod set. Motion in the effective potential of the rod set can explain many of the observed phenomena. The frequencies of ion oscillation in the x and y directions shift with amplitude in opposite directions as the amplitudes of oscillation increase. Excitation profiles for ion fragmentation become asymmetric and in some cases show bistable behavior where the amplitude of oscillation suddenly jumps between high and low values with very small changes in excitation frequency. Experiments show these effects. Ions are injected into a linear trap, stored, isolated, excited for MS/MS, and then mass analyzed in a time-of-flight mass analyzer. Frequency shifts between the x and y motions are observed, and in some cases asymmetric excitation profiles and bistable behavior are observed. Higher MS/MS efficiencies are expected when an octopole field is added. MS/MS efficiencies (N(2) collision gas) have been measured for a conventional quadrupole rod set and a linear ion trap with a 4% added octopole field. Efficiencies are chemical compound dependent, but when an octopole field is added, efficiencies can be substantially higher than with a conventional rod set, particularly at pressures of 1.4 x 10(-4) torr or less.
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