Results 261 to 270 of about 157,015 (313)
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Ion mobility–mass spectrometry
Journal of Mass Spectrometry, 2008AbstractThis review article compares and contrasts various types of ion mobility–mass spectrometers available today and describes their advantages for application to a wide range of analytes. Ion mobility spectrometry (IMS), when coupled with mass spectrometry, offers value‐added data not possible from mass spectra alone. Separation of isomers, isobars,
Abu B Kanu, Prabha Dwivedi, Maggie Tam
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Mobile Ions in Composite Solids
Chemical Reviews, 2020Fast ion conduction in solid-state matrices constitutes the foundation for a wide spectrum of electrochemical systems that use solid electrolytes (SEs), examples of which include solid-state batteries (SSBs), solid oxide fuel cells (SOFCs), and diversified gas sensors.
Zheyi Zou +14 more
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Toward Compact High-Performance Ion Mobility Spectrometers: Ion Gating in Ion Mobility Spectrometry
Analytical Chemistry, 2021Printed circuit board (PCB) based drift tube ion mobility spectrometers enable the use of state-of-the-art production techniques to manufacture compact devices with excellent performance at minimum cost. The new PCB ion mobility spectrometer (PCB-IMS) presented here is equipped with either a 140 MBq tritium or a 95 MBq nickel-63 ionization source and ...
Alexander Bohnhorst +2 more
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A Tandem Ion Trap/Ion Mobility Spectrometer
Analytical Chemistry, 2000A tandem quadrupole ion trap/ion mobility spectrometer (QIT/IMS) has been constructed for structural analysis based on the gas-phase mobilities of mass-selected ions. The instrument combines the ion accumulation, manipulation, and mass-selection capabilities of a modified ion trap mass spectrometer with gas-phase electrophoretic separation in a custom ...
, Creaser +3 more
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Mobility of large ions in water
The Journal of Chemical Physics, 2020Mobility of ions in polar liquids is diminished when the ionic charge is increased. This phenomenon, known as dielectric friction, is caused by the retarded response of the liquid’s dipoles to the charge movement. Linear response theories predict linear scaling of the inverse diffusion coefficient with the squared ionic charge.
Tuhin Samanta, Dmitry V. Matyushov
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Correlation ion mobility spectrometry
The Analyst, 2017Using a linearly swept chirp function to modulate a Bradbury–Nielsen (BN) ion gate and application of a common signal processing technique (cross-correlation), we outline a method for obtaining high resolution IMS–MS spectra with ion gate duty cycles approaching 50%.
Austen L. Davis +3 more
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Inverse Ion Mobility Spectrometry
Analytical Chemistry, 2009A novel method is proposed for enhancing the separation power of ion mobility spectrometry (IMS) and other similar pulsed techniques, such as time-of-flight mass spectrometry. In this technique, rather than generating an ion packet, a dip is created in the ion beam. This is achieved by an inverse pulse applied to the shutter grid.
Mahmoud, Tabrizchi, Elham, Jazan
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The Journal of Physical Chemistry A, 2005
A number of carboxylate anions spanning a mass range of 87-253 amu (pyruvate, oxalate, malonate, maleate, succinate, malate, tartarate, glutarate, adipate, phthalate, citrate, gluconate, 1,2,4-benzenetricarboxylate, and 1,2,4,5-benzenetetracarboxylate) were investigated using electrospray ionization ion mobility spectrometry.
Kim, Hugh I. +4 more
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A number of carboxylate anions spanning a mass range of 87-253 amu (pyruvate, oxalate, malonate, maleate, succinate, malate, tartarate, glutarate, adipate, phthalate, citrate, gluconate, 1,2,4-benzenetricarboxylate, and 1,2,4,5-benzenetetracarboxylate) were investigated using electrospray ionization ion mobility spectrometry.
Kim, Hugh I. +4 more
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Ion Mobility-Mass Spectrometer Interface for Collisional Activation of Mobility Separated Ions
Analytical Chemistry, 2008An ion mobility-mass spectrometer (IM-MS) interface is described that can be employed to perform collisional activation and/or collision-induced dissociation (CID) with good transmission of mobility separated ions to the MS analyzer. The IM-MS interface consists of a stacked-ring ion guide design, where the field strength and pressure ratio can be ...
Francisco A, Fernandez-Lima +5 more
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Biological Mass Spectrometry, 1988
Positive and negative ion mobility spectra of dimenhydrinate are presented, and the calculated reduced mobility (K0) values for the most significant peaks are reported. Mass identification of the ionic species associated with the peaks in the ion mobility spectra was achieved by interfacing the ion mobility spectrometer to a mass spectrometer.
A H, Lawrence, A A, Nanji
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Positive and negative ion mobility spectra of dimenhydrinate are presented, and the calculated reduced mobility (K0) values for the most significant peaks are reported. Mass identification of the ionic species associated with the peaks in the ion mobility spectra was achieved by interfacing the ion mobility spectrometer to a mass spectrometer.
A H, Lawrence, A A, Nanji
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