title: A differentially pumped dual linear quadrupole ion trap (DLQIT) mass spectrometer: a mass spectrometer capable of MS(n) experiments free from interfering reactions.
abstract: A novel differentially pumped dual linear quadrupole ion trap (DLQIT) mass spectrometer was designed and built to facilitate tandem MS experiments free from interfering reactions. The instrument consists of two differentially pumped Thermo Scientific linear quadrupole ion trap (LQIT) systems that have been connected via an ion transfer octupole encased in a machined manifold. Tandem MS experiments can be performed in the front trap and then the resulting product ions can be transferred via axial ejection into the back trap for further, independent tandem MS experiments in a differentially pumped area. This approach allows the examination of consecutive collision-activated dissociation (CAD) and ion-molecule reactions without unwanted side reactions that often occur when CAD and ion-molecule reactions are examined in the same space. Hence, it greatly facilitates investigations of ion structures. In addition, the overall lower pressure of the DLQIT, as compared to commercial LQIT instruments, results in a reduction of unwanted side reactions with atmospheric contaminants, such as water and oxygen, in CAD and ion-molecule experiments.
authors.affiliation: Center for Direct Catalytic Conversion of Biomass to Biofuels, Bindley Bioscience Center, Purdue University , 1203 W. State Street, West Lafayette, Indiana 47907, United States.
authors.forename: Benjamin C
authors.initials: BC
authors.lastname: Owen
authors.forename: Tiffany M
authors.initials: TM
authors.lastname: Jarrell
authors.forename: Jae C
authors.initials: JC
authors.lastname: Schwartz
authors.forename: Rob
authors.initials: R
authors.lastname: Oglesbee
authors.forename: Mark
authors.initials: M
authors.lastname: Carlsen
authors.forename: Enada F
authors.initials: EF
authors.lastname: Archibold
authors.forename: Hilkka I
authors.initials: HI
authors.lastname: Kenttämaa
mesh_terms: D007474:Ion Exchange; D013058:Mass Spectrometry / Q000379:methods; D010315:Particle Accelerators; D053719:Tandem Mass Spectrometry / Q000379:methods*