Search results for "Mass analyzer"

showing 4 items of 24 documents

Cluster isobars for high-precision mass spectrometry

1991

Doublet mass measurements of the isobars28Si3 and12C7 are performed by use of a Penning trap mass spectrometer and the Fourier transform ion cyclotron resonance (FT-ICR). The carbon and silicon cluster ions are produced by laser ablation. Results of these preliminary measurements are presented.

Secondary ion mass spectrometryMaterials sciencePhysics::Plasma PhysicsMass spectrumPhysics::Atomic PhysicsAtomic physicsMass spectrometryPenning trapQuadrupole mass analyzerAtomic and Molecular Physics and OpticsIon cyclotron resonanceFourier transform ion cyclotron resonanceHybrid mass spectrometerZeitschrift f�r Physik D Atoms, Molecules and Clusters
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Laser desorption/ionization cluster studies for calibration in mass spectrometry

2003

Precise mass calibration is mandatory in many fields of mass spectrometry. We have performed laser desorption/ionization cluster studies with a MALDI-TOF mass spectrometer on gold and fullerene targets to produce atomic clusters. These investigations demonstrate that clusters are ideally suited for this purpose. Pulsed N 2 -laser and Nd:YAG-laser ablation was used to produce positively as well as negatively charged clusters. Earlier observations of dianionic metal clusters are confirmed. First results from the tandem Penning trap mass spectrometer ISOLTRAP using carbon clusters as mass references show how carbon clusters can be applied to precision mass spectrometry by providing absolute ma…

Static secondary-ion mass spectrometryMaterials scienceMass spectrometryISOLTRAPAtomic and Molecular Physics and OpticsAtomic massPhysics::Atomic and Molecular ClustersMass spectrumPhysics::Atomic PhysicsAtomic physicsTime-of-flight mass spectrometryNuclear ExperimentQuadrupole mass analyzerHybrid mass spectrometerThe European Physical Journal D - Atomic, Molecular and Optical Physics
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Towards high-accuracy mass spectrometry of highly charged short-lived ions at ISOLTRAP

2006

Dedicated to H.-J. Kluge on the occasion of his 65th birthday anniversary - Jürgen Kluge Special Issue; Multiply charged ions of stable xenon isotopes from a plasma ion source have been mass-selected by the on-line mass separator ISOLDE/CERN and delivered to the triple-trap mass spectrometer ISOLTRAP. The doubly charged ions that survived the charge-exchange processes during bunching and ion preparation were transferred to a precision Penning trap for mass determination. Mass values were obtained for the isotopes with mass numbers A=126,129,130,136. They are consistent with previous results except for the case of $^{126}Xe$ where a significant deviation from the literature value was found. …

atomic masses[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]Thermal ionization mass spectrometryMass spectrometry01 natural sciencesISOLTRAPhistory of atomic massesNuclear physics0103 physical scienceshistory of mass spectrometryPhysical and Theoretical ChemistryNuclear Experiment010306 general physicsInstrumentationQuadrupole mass analyzerSpectroscopy010308 nuclear & particles physicsChemistryNuclear binding energiesHighly charged ionevaluation of atomic massesCondensed Matter PhysicsPenning trapIon sourceAtomic physicsHybrid mass spectrometerInternational Journal of Mass Spectrometry
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Validation of Methylmercury Determinations in Aquatic Systems by Alkyl Derivatization Methods for GC Analysis Using ICP-IDMS

2001

Isotope dilution mass spectrometry (IDMS), using an inductively coupled plasma quadrupole mass spectrometer (ICPMS) and a species-specific methylmercury spike was applied to validate the commonly used GC method for methylmercury (MeHg+) determination, which is based on the formation of volatile methylethylmercury by derivatization with NaBEt4. The spike compound, Me201Hg+, was synthesized by reaction of 201Hg-enriched mercury chloride with methylcobalamin. By analyzing different environmental aquatic samples, it was found that in most cases, transformation of MeHg+ into elemental mercury (Hg0) took place. From investigations of synthetic solutions, it could be followed that halide ions are …

chemistry.chemical_compoundChromatographyChemistrychemistry.chemical_elementGas chromatographyInductively coupled plasmaIsotope dilutionDerivatizationMass spectrometryQuadrupole mass analyzerMethylmercuryAnalytical ChemistryMercury (element)Analytical Chemistry
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