G
Gary J. Van Berkel
Researcher at Oak Ridge National Laboratory
Publications - 182
Citations - 9695
Gary J. Van Berkel is an academic researcher from Oak Ridge National Laboratory. The author has contributed to research in topics: Mass spectrometry & Electrospray ionization. The author has an hindex of 51, co-authored 180 publications receiving 9226 citations. Previous affiliations of Gary J. Van Berkel include University of Tennessee & Battelle Memorial Institute.
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Tandem mass spectrometry of small, multiply charged oligonucleotides.
TL;DR: Multiply charged anions derived from electrospray ionization of the sodium salts of various small oligonucleotides have been subjected to tandem mass spectrometry (MS/MS) in a quadrupole ion trap.
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Fully automated liquid extraction‐based surface sampling and ionization using a chip‐based robotic nanoelectrospray platform
TL;DR: A fully automated liquid extraction-based surface sampling device utilizing an Advion NanoMate chip-based infusion nanoelectrospray ionization system is reported andalyses were enabled for discrete spot sampling by using the Advanced User Interface of the current commercial control software.
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Established and emerging atmospheric pressure surface sampling/ionization techniques for mass spectrometry
Gary J. Van Berkel,Gary J. Van Berkel,Sofie P. Pasilis,Olga S. Ovchinnikova,Olga S. Ovchinnikova +4 more
TL;DR: This tutorial article sorts this vast array of atmospheric pressure techniques suitable for sampling analytes from surfaces, forming ions from these analytes, and subsequently transporting these ions into vacuum for interrogation by MS on the basis of the approaches used for surface sampling and ionization.
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Electrochemical Origin of Radical Cations Observed in Electrospray Ionization Mass Spectra
TL;DR: In this article, a variety of experimental data is presented that implicates electrochemical oxidation of analytes in the electrospray (ES) needle as the mechanism for formation of molecular radical cations observed in the ES ionization mass spectra of alkylsubstituted metalloporphyrins, polycyclic aromatic hydrocarbons (PAHs), and other compound types.
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Electrochemical processes in electrospray ionization mass spectrometry
Juan Fernandez de la Mora,Gary J. Van Berkel,Christie G. Enke,Richard B. Cole,Manuel Martinez-Sanchez,John B. Fenn +5 more
TL;DR: This month's Special Feature presented a set of five articles that constituted a Commentary on the fundamentals and mechanism of electrospray ionization (ESI), which produced some lively discussion among the authors on the role of electrochemistry in ESI.