Results 261 to 270 of about 219,369 (310)
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Avalanche photodiode based time-of-flight mass spectrometry
Review of Scientific Instruments, 2015This study reports on the performance of Avalanche Photodiodes (APDs) as a timing detector for ion Time-of-Flight (TOF) mass spectroscopy. We found that the fast signal carrier speed in a reach-through type APD enables an extremely short timescale response with a mass or energy independent <2 ns rise time for <200 keV ions (1−40 AMU ...
Keiichi Ogasawara +5 more
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Quantitative liquid chromatography/time‐of‐flight mass spectrometry
Biomedical Chromatography, 2007AbstractOver the last decade, time‐of‐flight (TOF) instruments have increasingly been used as quantitation tools. In addition, because of their high resolving power, they can be used for verification of empirical formulas. Historically, TOF instruments have had limited quantitation capabilities because of their narrow dynamic range.
Leah N, Williamson, Michael G, Bartlett
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Modern MALDI time‐of‐flight mass spectrometry
Journal of Mass Spectrometry, 2009AbstractThis paper focuses on development of time‐of‐flight (TOF) mass spectrometry in response to the invention of matrix‐assisted laser desorption/ionization (MALDI). Before this breakthrough ionization technique for nonvolatile molecules, TOF was generally considered as a useful tool for exotic studies of ion properties but was not widely applied to
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Aerosol Time-of-Flight Mass Spectrometry
2017Aerosol time-of-flight mass spectrometry (ATOFMS) is a unique analytical method which incorporates two existing techniques for particle analysis: time-of-flight aerosol beam spectrometry and time-of-flight mass spectrometry (TOFMS). Atmospheric aerosols, produced by anthropogenic, biogenic, and geogenic sources are prevalent throughout our environment ...
Christopher A. Noble +1 more
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Multiple-reflection time-of-flight mass spectrometry
International Journal of Mass Spectrometry, 2013Abstract Multiple-reflection time-of-flight mass spectrometry is an emerging technique that meets the challenges of mass spectrometry at current and future accelerator facilities for the research with exotic nuclei. Moreover, many new applications in analytical mass spectrometry appear on the horizon.
Wolfgang R. Plaß +2 more
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Hadamard Transform Time-of-Flight Mass Spectrometry
Analytical Chemistry, 1998A new mode of operation of a time-of-flight mass spectrometer (TOFMS) is described and demonstrated. A continuous ion beam emerging from the ion source is accelerated and then modulated by a pseudorandom sequence of “on” and “off” pulses. The data acquisition period is set to match the period of the modulation sequence, and data are acquired ...
Ansgar Brock +2 more
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High-resolution time-of-flight mass spectrometry
International Journal of Mass Spectrometry and Ion Physics, 1974Abstract The conventional time-of-flight mass spectrometer is limited in its mass resolution by the initial velocity distribution of the ions to be analyzed. A new method of impulsed field focusing has been devised which employs time-dependent ion draw-out fields and which is applicable to time-of-flight instruments of any drift length.
N.L. Marable, George Sanzone
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Fourier transform time-of-flight mass spectrometry
Analytical Chemistry, 1986Nouveau mode de fonctionnement de la spectrometrie a temps de vol dans laquelle la source ionique et le detecteur sont modules en balayant la frequence ...
Fritz J. Knorr +2 more
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Time-of-Flight Mass Spectrometry
1997The emphasis in this discussion is on time-of-flight mass spectrometry as it relates to present and potential biological applications. It is not intended to be a comprehensive review of time-of-flight technology. Some excellent reviews have been published recently, and the reader is referred to those for subjects not covered here. [1–3] We begin with a
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Laser Desorption Time-of-Flight Mass Spectrometry
2015Abstract Laser desorption mass spectrometry is demonstrated in this chapter as a general tool for the analysis of solid materials, including fullerenes, metals, inorganic compounds, and biomolecules. These experiments use a pulsed Nd:YAG laser coupled with a time-of-flight mass spectrometer.
Robert N. Compton, Michael A. Duncan
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