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Showing 1 to 20 of 348 for “"Mass Spectrometer"”.
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Development of a quadrupole mass spectrometer
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering, 1964.
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NEREUS Nemertes : embedded mass spectrometer control system
… software suite to control an embedded autonomous mass spectrometer. I first evaluate previous control systems for the hard- ware and evaluate a set of software design goals. The NSystem software builds upon the previous functionalities by offering text-file based scheduling and subroutines, as …
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MINIATURE MASS SPECTROMETER SYSTEM WITH A SAMPLING PROBE
… thesis focuses on the development of miniature mass spectrometry systems and the sampling probes. Mass spectrometers are usually installed and used in the analytical laboratory. It requires complex sample preparation before the analysis. Use of miniature mass spectrometer enables the chemical …
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Real-time Feature Detection in Mass Spectrometer Data
… pre-processing of the complex files created by mass spectrometers during proteomics experiments is required before it is possible to gain any insight from them. A typical mass spectrometer run may produce forty thousand scans of data each containing around two thousand data points. If this data …
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Design and implementation of a custom imaging mass spectrometer.
Mass spectrometry (MS) has been demonstrated as one of the most robust and capable analytical tools for chemical analysis. As such, MS has found application across practically every field of science today. One notable area where MS is used today is in the analysis of biological samples, such as …
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Development and performance of a miniature, low cost mass spectrometer
A miniature, low cost mass spectrometer has been developed that is capable of unit resolution over a mass range of 10 to 50 AMU. The design of the mass spectrometer incorporates several new features that enhance the performance of the design over comparable instruments. An efficient ion source …
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The development of components for an in-situ mass spectrometer
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2000.
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Micrometer-scale chemical analysis using heated AFM cantilever and mass spectrometer
… atomic force microscope(AFM) cantilever and mass spectrometer. Simulations investigate the underlying transport mechanisms within the system and the impact of various design parameters. The way to optimize the system is suggested based on the simulation results. A heated microcantilever is …
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Molecular Thermodynamics and Knudsen Cell - Mass Spectrometer Studies of Liquid Metal Mixtures
Made available in DSpace on 2014-12-13T18:55:34Z (GMT). No. of bitstreams: 1 7709140.pdf: 5295489 bytes, checksum: 35b97660db8ded30f6f94b9965342212 (MD5) Previous issue date: 1976
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Construction And Demonstration Of A Tandem Mass Spectrometer Based Instrument For Cold Ion Spectroscopy
… instrument incorporating ion trap based tandem mass spectrometry and cold ion UV and UV-IR double resonance spectroscopy has been developed at Purdue University for the study of gas phase, biologically relevant ions. The instrument incorporates multiple quadrupole linear ion trap mass analyzers …
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Ion Transmission in the first vacuum stage of an Inductively Coupled Plasma Mass Spectrometer
The inductively coupled plasma mass spectrometer (ICP-MS) is the instrument of choice for trace and ultra-trace elemental analysis. However, the ICP-MS suffers from matrix effects. Matrix effects occur when instrument response varies as the composition of the sample matrix is changed. Matrix …
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A molecular beam mass spectrometer study of fuel-rich and sooting benzene-oxygen flames
Thesis (Sc.D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1981.
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A Novel Mass Spectrometer for Atmospheric Measurements & Halocarbons During the CARIBIC and SAMBBA Aircraft Campaigns
… A prototype time-of-flight gas chromatography-mass spectrometer (GCMS) was characterised for atmospheric measurements. Instrument performance was found to be at the lower end of expectations. A comparison to a quadrupole GC-MS indicated that the TOF GC-MS would be suitable for measurements in …
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The Helium-Ion-Microscope Secondary-Ion-Mass-Spectrometer: A New Tool for Earth and Materials Science
The Helium-Ion-Microscope Secondary-Ion-Mass-Spectrometer: A New Tool for Earth and Materials Science - Matthew Ball Geological materials are exceptionally complex, with heterogeneity across all lengthscales. Likewise, the history of these materials is complex, experiencing extremes of pressure and …
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Development of a quadrupole ion trap / time-of-flight mass spectrometer for mass resolution and ion photophysics
Development of a tandem mass spectrometer, consisting of a quadrupole ion trap (QIT) and a time-of-flight, is described for ion mass resolution and photophysics. Ions are generated externally by electrospray ionization and trapped in the quadrupole ion trap before extraction to the time-of-flight …
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Development Of A Field-Portable Miniature Mass Spectrometer Designed For In-Situ Analysis And Ion Trap Miniaturization
<p>Chemical analysis by mass spectrometry has become the gold standard due to the sensitivity, selectivity, and short analysis times that are afforded by the method. Advances in miniaturized vacuum systems, mass analyzers, electronics, and ionization sources have allowed for the development of …
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Velocity and Temperature Characterization of the First Vacuum Stage Expansion in an Inductively Coupled Plasma - Mass Spectrometer
<p>The inductively coupled plasma - mass spectrometer (ICP-MS) is the analytical instrument of choice for trace element detection and quantification. Despite the popularity of ICP-MS, significant degradation in sensitivity and precision occurs as the result of matrix and instrument-induced effects. …
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