Results 1 to 10 of about 20,265 (247)

On-line analysis of coffee roasting with ion mobility spectrometry–mass spectrometry (IMS–MS) [PDF]

International Journal of Mass Spectrometry, 2018
Online analysis of coffee roasting was performed using ion mobility spectrometry–mass spectrometry (IMS-MS) with corona discharge ionization. This is the first time that formation of volatile organic compounds (VOCs) during coffee roasting was monitored not only in positive but also in negative ion mode, and not only with mass spectrometry, but also ...
Chahan Yeretzian, Michael Groessl
exaly   +5 more sources

Ion mobility spectrometry–mass spectrometry (IMS–MS) for on- and offline analysis of atmospheric gas and aerosol species [PDF]

Atmospheric Measurement Techniques, 2016
Measurement techniques that provide molecular-level information are needed to elucidate the multiphase processes that produce secondary organic aerosol (SOA) species in the atmosphere. Here we demonstrate the application of ion mobility spectrometry-mass
J. E. Krechmer, M. Groessl, X. Zhang, H. Junninen, P. Massoli, A. T. Lambe, J. R. Kimmel, M. J. Cubison, S. Graf, Y.-H. Lin, S. H. Budisulistiorini, H. Zhang, J. D. Surratt, R. Knochenmuss, J. T. Jayne, D. R. Worsnop, J.-L. Jimenez, M. R. Canagaratna   +17 more
doaj   +6 more sources

Positive Reactant Ion Formation in High Kinetic Energy Ion Mobility Spectrometry (HiKE-IMS) [PDF]

Journal of the American Society for Mass Spectrometry, 2020
In contrast to classical Ion Mobility Spectrometers (IMS) operating at ambient pressure, the High Kinetic Energy Ion Mobility Spectrometer (HiKE-IMS) is operated at reduced pressures of between 10 and 40 mbar and higher reduced electric field strengths of up to 120 Td.
Ansgar T Kirk, Maria Allers, Stefan Zimmermann   +2 more
exaly   +4 more sources

Negative Reactant Ion Formation in High Kinetic Energy Ion Mobility Spectrometry (HiKE-IMS) [PDF]

Journal of the American Society for Mass Spectrometry, 2020
Due to the operation at background pressures between 10-40 mbar and high reduced electric field strengths of up to 120 Td, the ion–molecule reactions in High Kinetic Energy Ion Mobility Spectrometers (HiKE-IMS) differ from those in classical ambient pressure IMS.
Ansgar T Kirk, Maria Allers, Stefan Zimmermann   +2 more
exaly   +4 more sources

Resolving Isomeric Structures in Natural Complex Carbohydrates: A Comparative Study of SLIM and Cyclic Ion Mobility Platforms. [PDF]

Rapid Commun Mass Spectrom
ABSTRACT Rationale Recent advances in ion mobility mass spectrometry (IMS) have led to the development of high‐resolution platforms such as cyclic IMS and SLIM IMS (structures for lossless ion manipulations), both offering enhanced capabilities for resolving complex biomolecular conformations.
Benazza R, Harrilal CP, Ibrahim YM, Fanuel M, Ropartz D, Rogniaux H.   +5 more
europepmc   +2 more sources

Liquid Atmospheric Pressure MALDI (LAP-MALDI) Mass Spectrometry: A Versatile Tool for the Characterization of Synthetic Polymers. [PDF]

Rapid Commun Mass Spectrom
ABSTRACT Rationale Liquid atmospheric pressure matrix‐assisted laser desorption/ionization (LAP‐MALDI) mass spectrometry (MS) has previously been applied to the analysis of biopolymers such as peptides, proteins, and DNA, producing ESI‐like multiply charged analyte ions.
Kowalczyk AE, Brown J, Morris M, Cramer R.   +3 more
europepmc   +2 more sources

Characterization of Grape Cane Stilbenoids and Their Photo-Degradation Products by HPLC-DAD Coupled With Trapped Ion Mobility Spectrometry and High-Resolution Tandem Mass Spectrometry. [PDF]

Rapid Commun Mass Spectrom
ABSTRACT Rationale Bioactive (E)‐stilbenoids in vine extracts are prone to light‐induced transformation into the respective (Z)‐isomers and further degradation products, often resulting in a loss of bioactivity. We sought to study stilbenoid degradation beyond that of the well‐researched resveratrol due to the high diversity of stilbenoids in nature ...
Besrukow P, Schnitker FA, Schweiggert R, Steingass CB.   +3 more
europepmc   +2 more sources

Perspective on Developments in Ion Mobility Spectrometry-Mass Spectrometry Combined with Ion Spectroscopy [PDF]

Zhipu Xuebao, 2022
Combined with mass spectrometry, ion spectroscopy can obtain a spectrum of the target ion by measuring its intensity change, which is induced by laser strength and wavelength.
WANG Na1, SU Wen1, ZHANG Di2, JIANG You2, FANG Xiang2, YUE Lei1   +5 more
doaj   +1 more source

New Development in Ion Mobility Spectrometry for Analysis of Small Molecule Isomers [PDF]

Zhipu Xuebao, 2022
With the rapid development of modern detection technology and scientific research, the chemical structures and functions of isomers are constantly being revealed.
WU Fang-ling1, ZHANG Di2, XU Fu-xing1, FANG Xiang2, DING Chuan-fan1   +4 more
doaj   +1 more source

Hadamard Transform Ion Mobility Spectrometry Based on Matrix Encoding Modulation

Sensors, 2023
Ion mobility spectrometry (IMS) has been widely used for the on-site detection of trace chemicals, but continue to suffer from a low duty cycle of ion injection.
Ke Chen, Lingfeng Li, Peng Li
doaj   +1 more source