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Showing 1 to 11 of 11 for “"Reflectron"”.
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BINDING ENERGIES AND SOLVATION OF ORGANIC MOLECULAR IONS, REACTIONS OF TRANSITION METAL IONS WITH, AND PLASMA DISCHARGE IONIZATION OF MOLECULAR CLUSTERS
… the polymerization of acetylene done using the reflectron time of flight mass spectrometry and DFT calculations is also reported in this dissertation. We explain the variation in the observed trend in C-H/C-C activity of these ions. We also report the formation of carbide complexes by Zr+, Nb+, …
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Development of a quadrupole ion trap / time-of-flight mass spectrometer for mass resolution and ion photophysics
… affecting mass resolutions in linear and reflectron time-of-flight modes are identified and possible improvements are discussed. An ion trap consisting of two endcaps and two ring flat electrodes is proposed and constructed on this basis. The newly optimized design is shown to yield the …
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The Study of Positive-Ion Mass Spectrometry of 5-Fluorouracil Using Low-Energy Electron Impact
… with the molecules are extracted into a reflectron time-of-flight mass spectrometer. The field-free region and the reflector of the time-of-flight mass spectrometer are both located in the flight-tube. The reflector is positioned at the end of the flight-tube and directs the ions back …
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Study of Electron-Impact Induced Fragmentation of Thymine
… and a deflection system for steering the beam. A reflectron time-of-flight mass spectrometer with a microchannel plate detector is used to detect and mass resolve the positively charged fragments. LabVIEW based data acquisition techniques are used to accumulate the time-of-flight data as a …
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Low-Energy Electron Impact Fragmentations of the Polycyclic Aromatic Hydrocarbon Anthracene
… to form positively charged fragments. A reflectron time-of-flight mass spectrometer with a microchannel plate detector is used to mass-resolve and detect the fragment ions. A multichannel scaler card is used for acquiring single mass spectra. Data acquisition is controlled by LabVIEW …
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Study of Low Energy Electron-Impact Induced Ionization and Fragmentation of Uracil
… fragments are mass resolved and detected using a reflectron time of flight mass spectrometer with a microchannel plate detecter. A multichannel scaler card is used for data acquisition. Code written in LabVIEW is used to control the electron impact energy and the acquisition of mass spectra as a …
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Development of an Apparatus for the Study of Electron Impact Fragmentation of Molecular Clusters
… Ionised fragments are detected using a reflectron time-of-flight mass spectrometer with a microchannel plate detector. Neutral metastable fragments are detected using a channeltron with appropriately biased meshes in front to avoid the detection of charged particles. For both types of …
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UV Induced Processes in Biomolecules, Hydrated Clusters and Stark Deflected Beams
… Exploiting the capabilities of <i>reflectron</i> mass spectrometry to study the metastable dissociation of excited ions and cluster ions is a major theme in this thesis. Photon energy thresholds for metastable dissociation from multi-photon ionized uracil and thymine are reported …
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Development of analytical methodology based on chromatographic and mass spectrometric techniques for the characterization and fingerprinting of bioactive compounds of Crocus sativus L.
… compounds. ESI MS methodology mainly quadrupole reflectron time-of-flight (QqTOF) instrumentation managed to detect noncovalent complexes between Aβ (1-40) and crocins (with different number of glucose moieties) in a series of studies focused on screening the ability of several bioactive …
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Measurement of soot precursor particles under atmospheric and low pressure conditions by means of time-of-flight mass spectrometry
… mass spectrometry. To this end a ”custom-built” reflectron time-of-flight mass spectrometer of high sensitivity and with a large mass range is used. Measurements are carried out in different premixed ethylene laboratory flames at different pressures and in a wide range of stoichiometries. …
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Laser-Ionization Time-of-Flight Mass Spectrometry of High Molecular Mass Inorganic Complexes
Laser-Ionization Time-of-Flight Mass Spectrometry (LI-TOF-MS) is a sophisticated tool for the molecular-weight determination and structural characterization of a variety of molecules. Advances in instrumentation and ionization methods have recently expanded its role in the analysis of high-mass …