Gas phase salt clusters from electrosprayed alkaline earth colloids

Pope, R. Marshall; Shen, Nanzhu; Nicoll, Jeremy B.; Tarnawiecki, Boris; Dejsupa, C.; Dearden, David V.

doi:10.1016/s0168-1176(96)04515-6

Cited by 9 publications

(5 citation statements)

References 12 publications

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“…Marshall's group (Senko et al, 1997) described a linear octopole ion trap coupled to a FTMS; earlier, Pope et al (1997) had described external ion accumulation in a hexapole trap; however, details regarding the trap were not provided. Other groups soon followed by incorporating linear multipole traps into their FTMS systems.…”

Section: Linear Traps Combined With Fticrmentioning

confidence: 99%

Linear ion traps in mass spectrometry

Douglas

Frank

Mao

2004

Mass Spectrometry Reviews

395

342

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Linear ion traps are finding new applications in many areas of mass spectrometry. In a linear ion trap, ions are confined radially by a two-dimensional (2D) radio frequency (RF) field, and axially by stopping potentials applied to end electrodes. This review focuses on linear ion trap instrumentation. Potentials and ion motion in linear multipole fields and methods of ion trapping, cooling, excitation, and isolation are described. This is followed by a description of various mass discrimination effects that have been reported with linear ion traps. Linear ion traps combined in various ways with three-dimensional (3D) traps, time-of-flight (TOF) mass analyzers, and Fourier transform ion cyclotron resonance mass spectrometers are then given. Linear ion traps can be used as stand alone mass analyzers, and their use for mass analysis by Fourier transforming image currents, by mass selective radial ejection, and by mass selective axial ejection are reviewed.

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Section: Linear Traps Combined With Fticrmentioning

confidence: 99%

Linear ion traps in mass spectrometry

Douglas

Frank

Mao

2004

Mass Spectrometry Reviews

395

342

View full text Add to dashboard Cite

show abstract

“…All experiments were performed using a Fourier transform ion cyclotron resonance mass spectrometer , (model APEX 47e, Bruker Daltonics; Billerica, MA) and a microelectrospray ionization source modified from an Analytica (Analytica of Branford; Branford, MA) design . The instrument was controlled using a MIDAS data system (National High Magnetic Field Ion Cyclotron Resonance Facility; Tallahassee, FL).…”

mentioning

confidence: 99%

Cucurbit[6]uril Pseudorotaxanes: Distinctive Gas-Phase Dissociation and Reactivity

et al. 2003

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Cucurbit[6]uril forms a doubly charged complex with 1,4-butanediammonium cation that is observed using electrospray ionization Fourier transform mass spectrometry. Such 1:1 complexes are not observed for the smaller cucurbit[5]uril, which forms a 2:1 ammonium:cucurbituril complex instead. The 1:1 complex with cucurbit[6]uril is difficult to fragment via collisional activation; when it does fragment, both breakup of the cucurbituril cage and loss of the amine are observed. Further, the complex reacts with tert-butylamine via slow adduction. In contrast, nonrotaxane analogues (such as doubly charged 2:1 complexes of either protonated 1,4-butanediamine or protonated ethylenediamine with cucurbit[6]uril) fragment via easy loss of the intact amine upon collisional activation and react with tert-butylamine via rapid displacement of the original amine. On the basis of stoichiometry, fragmentation behavior, and reactivity, we conclude that the doubly charged complex of cucurbit[6]uril with 1,4-butanediammonium is a gas-phase pseudorotaxane.

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“…The nitrogen drying gas was heated to 180 °C and held at a flow rate of 20 L/hr. The transfer capillary voltage was 4000 V on the source side and 90 V on the analyzer side, with the skimmer voltage at 1.7 V. A hexapole ion guide in the external ESI source was used to accumulate ions for times ranging from 0.5 to 5.0 s 34–37. before transfer to the INFINITY™38 analyzer cell of the FTMS.…”

Section: Methodsmentioning

confidence: 99%

The significance of monoisotopic and carbon-13 isobars for the identification of a 19-component dodecapeptide library by positive ion electrospray Fourier transform ion cyclotron resonance mass spectrometry

Ramjit¹,

Kruppa²,

Spier³

et al. 2000

Rapid Commun. Mass Spectrom.

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Harnessing the ultra high resolution capabilities of Fourier transform ion cyclotron resonance mass spectrometry (FTICR‐MS) and positive ion electrospray, we have demonstrated the significance and utility of cumulative mass defect high resolution mass separation stable isotope distribution, exact mass measurement and elemental formula as a means of simultaneously identifying 19 components of the dodecapeptide library Ac‐ANKISYQS[X]STE‐NH2. With an instrument resolution of 275 000 (average), isobaric multiplets attributed to monoisotopic and carbon‐13 components of peptides: Ac ∼ SLS ∼ NH2; Ac ∼ SNS ∼ NH2; Ac ∼ SOS ∼ NH2; Ac ∼ SDS ∼ NH2; within the mass window of 1380–1385 Da, and Ac ∼ SQS ∼ NH2; Ac ∼ SKS ∼ NH2; Ac ∼ SES ∼ NH2; Ac ∼ SMS ∼ NH2, within the mass window 1395–1400 Da, were mass resolved, accurately mass measured and identified from the computed molecular formulas. This experimental procedure enabled the separation of monoisotopic and carbon‐13 isobars yielding enhanced selectivity and specificity and serves to illustrate the significance of monoisotopic and carbon‐13 isobars in final product analysis. Chromatographic separation (HPLC) was of limited utility except for monitoring the overall extent of reaction and apparent product distribution. Positive ion electrospray‐FTICR‐MS and fast atom bombardment (FAB) MS were used to assess final product quality and apparent component distribution. Copyright © 2000 John Wiley & Sons, Ltd.

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Gas phase salt clusters from electrosprayed alkaline earth colloids

Cited by 9 publications

References 12 publications

Linear ion traps in mass spectrometry

Linear ion traps in mass spectrometry

Cucurbit[6]uril Pseudorotaxanes: Distinctive Gas-Phase Dissociation and Reactivity

The significance of monoisotopic and carbon-13 isobars for the identification of a 19-component dodecapeptide library by positive ion electrospray Fourier transform ion cyclotron resonance mass spectrometry

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