Search results for "Soft laser desorption"

showing 4 items of 4 documents

A new interface to couple thin-layer chromatography with laser desorption/atmospheric pressure chemical ionization mass spectrometry for plate scanni…

2005

An interface to allow on-line qualitative and quantitative full-plate detection and analysis of compounds separated by thin-layer chromatography (TLC) is presented. A continuous wave diode laser is employed as a desorption source. Atmospheric pressure chemical ionization mass spectrometry ionizes and subsequently identifies the desorbed sample molecules. Besides direct laser desorption on untreated TLC plates, graphite particles were used as a matrix to couple in the laser power and improve the efficiency of desorption.

Desorption electrospray ionizationChromatographyMatrix-assisted laser desorption electrospray ionizationChemistryOrganic ChemistryAnalytical chemistryEquipment DesignMass spectrometryIon sourceSoft laser desorptionAnalytical ChemistryAtmospheric-pressure laser ionizationSpecimen HandlingEquipment Failure AnalysisSystems IntegrationAtmospheric PressureSpectrometry Mass Matrix-Assisted Laser Desorption-IonizationDirect electron ionization liquid chromatography–mass spectrometry interfaceSpectroscopyAmbient ionizationRapid communications in mass spectrometry : RCM
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Production of negative osmium ions by laser desorption and ionization.

2010

The interest to produce negative osmium ions is manifold in the realm of high-accuracy ion trap experiments: high-resolution nearly Doppler-free laser spectroscopy, antihydrogen formation in its ground state, and contributions to neutrino mass spectrometry. Production of these ions is generally accomplished by sputtering an Os sample with Cs(+) ions at tens of keV. Though this is a well-established method commonly used at accelerators, these kind of sources are quite demanding and tricky to operate. Therefore, the development of a more straightforward and cost effective production scheme will be of benefit for ion trap and other experiments. Such a scheme makes use of desorption and ionizat…

Matrix-assisted laser desorption electrospray ionizationMaterials scienceThermal ionizationMass spectrometryIon sourceSoft laser desorptionlaw.inventionAtmospheric-pressure laser ionizationPhysics::Plasma PhysicsReflectronlawPhysics::Atomic and Molecular ClustersPhysics::Atomic PhysicsAtomic physicsInstrumentationAmbient ionizationThe Review of scientific instruments
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Measurement of nanoparticle mass distributions by laser desorption/ionization time-of-flight mass spectrometry.

2011

In this paper, access to the mass distribution analysis of nanoparticles is described based on laser desorption/ionization and time of flight mass spectrometry. Two examples are given, demonstrating the accurate mass distribution analysis of nanoparticles fabricated both ex situ and in situ during the laser-assisted desorption process. The potentials and the limitations of the method are discussed, with special emphasis on carbonaceous clusters and molecules.

Desorption electrospray ionizationStatic secondary-ion mass spectrometryMatrix-assisted laser desorption electrospray ionizationChemistryAnalytical chemistryGeneral Materials ScienceTime-of-flight mass spectrometryCondensed Matter PhysicsMass spectrometrySoft laser desorptionIon sourceAmbient ionizationJournal of physics. Condensed matter : an Institute of Physics journal
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Laser preparation of bunched ion beams

1997

Abstract Laser ionization at ISOLDE is performed with high repetition laser beams in the ion source unit and for daughter elements with low repetition lasers synchronized with laser desorption from a secondary target. We are preparing an implementation of thermal adsorption followed by laser desorption and laser ionization in the target ion source unit of ISOLDE. The combination of resonance ionization with thermal bunching allows the preparation of bunched and chemically pure ion beams. Bunched ion beams of Mg or Ca are prepared for post-acceleration at REX-ISOLDE. In order to investigate the process of adsorption and pulsed laser desorption, experiments are performed with Ba vapour. In a …

Nuclear and High Energy PhysicsDye laserMatrix-assisted laser desorption electrospray ionizationChemistryAnalytical chemistryPhysics::OpticsLaserSoft laser desorptionIon sourcelaw.inventionAtmospheric-pressure laser ionizationX-ray laserlawIonizationPhysics::Atomic and Molecular ClustersPhysics::Accelerator PhysicsPhysics::Atomic PhysicsAtomic physicsInstrumentationNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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