Results 301 to 310 of about 230,711 (334)

Ion suppression effect in desorption electrospray ionization and electrospray ionization mass spectrometry

Rapid Communications in Mass Spectrometry, 2017
RationaleAlthough it is claimed that desorption electrospray ionization (DESI) causes less ion suppression effects than electrospray ionization (ESI), a related investigation with quantification measurement of ion suppression effects is absent. Herein, a comparative analysis of ion suppression effects between DESI and ESI was conducted, with the aiming
Zheng Wang, Haijing Zhu, Guangming Huang
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Electrospray ionization of volatiles in breath [PDF]

International Journal of Mass Spectrometry, 2007
Abstract Recent work by Zenobi and colleagues [H. Chen, A. Wortmann, W. Zhang, R. Zenobi, Angew. Chem. Int. Ed. 46 (2007) 580] reports that human breath charged by contact with an electrospray (ES) cloud yields many mass peaks of species such as urea, glucose, and other ions, some with molecular weights above 1000 Da.
Pablo Martínez-Lozano, J. Fernandez de la Mora   +1 more
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Internal energy distribution in electrospray ionization

Journal of Mass Spectrometry, 2004
AbstractInternal energies and energy distributions were studied using the ‘survival yield’ method developed previously. In addition to conventional benzylpyridinium salts, protonated esters (fragmenting by rearrangement) and protonated leucine enkephalin were also used, extending the validity of the technique.
Naban-Maillet, J., Lesage, D., Bossee, A., Gimbert, Y., Sztaray, J., Vekey, K., Tabet, J.-C.   +6 more
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Spray Mechanism of Contained-Electrospray Ionization

Journal of the American Society for Mass Spectrometry, 2020
Analytical characteristics of contained electrospray ionization (ESI) are summarized in terms of its potential to modify the analyte solution during the stages of droplet formation to provide opportunities to generate native versus denatured biomolecular gas-phase ions, without the need for bulk-phase analyte modifications.
Colbert F. Miller, Benjamin J. Burris, Abraham K. Badu-Tawiah   +2 more
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The Charging of Micellar Nanoparticles in Electrospray Ionization [PDF]

ChemPhysChem, 2013
AbstractCharging of nanoparticles through electrospray has scarcely been explored. Spherical nanometer‐sized amphiphilic block copolymer nanoparticles with diameters ranging from ∼65 to ∼150 nm were electrosprayed and analysed by charge detection spectrometry. Herein, we explore the charging of these micellar nano‐objects by conducting a thorough study
Marion Santacreu, Wenjing Zhang, Muriel Lansalot, Tristan Doussineau, Rodolphe Antoine, Isabelle Chaduc, Philippe Dugourd, Franck D'Agosto, Bernadette Charleux   +8 more
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[21] Electrospray ionization mass spectrometry

1996
Publisher Summary An electrospray ionization source operating at atmospheric pressure was first interfaced to a mass spectrometer in Fenn's laboratory at Yale University (New Haven, CT), with inspiration taken from earlier ion-stopping potential studies, using electrospray ionization conducted by Mack et al .
Banks Jf, Whitehouse Cm
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[22] Electrospray ionization mass spectrometry

1990
Publisher Summary This chapter discusses electrospray ionization mass spectrometry. Electrospray ionization (ESI) occurs during the electrostatic nebulization of a solution of charged analyte ions by a large electrostatic field gradient (approximately 3 kV/cm). Highly charged droplets are formed in a dry bath gas, at near atmospheric pressure.
Charles G. Edmonds, Richard D. Smith
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Incorporation of a Venturi Device in Electrospray Ionization

Analytical Chemistry, 2003
Electrospray ionization has grown to be one of the most commonly used ionization techniques for mass spectrometry, and efforts continue to improve its performance. Typically, the sprayer tip must be very close to the entrance orifice of the mass spectrometer in order to maximize the conduction of ions from the sprayer into the mass spectrometer ...
David V. Dearden, Li Zhou, and Alan L. Rockwood, Edgar D. Lee, Milton L. Lee, Bingfang Yue   +5 more
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Probe Electrospray Ionization

2014
Probe electrospray ionization (PESI) is an electrospray-based atmospheric-pressure surface sampling and ionization technique for mass spectrometry that uses a solid needle instead of a capillary. While ionization occurs in a fashion similar to that involved in electrospray ionization, the novel aspect of PESI is discontinuous sampling.
Mridul Kanti Mandal, Kenzo Hiraoka
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Electrospray ionization mass spectrometry of ginsenosides

Journal of Mass Spectrometry, 2002
AbstractGinsenosides Rb1, Rb2, Rc, Rd, Re, Rf, Rg1, Rg2 and F11 were studied systematically by electrospray ionization mass spectrometry in positive‐ and negative‐ion modes with a mobile‐phase additive, ammonium acetate. In general, ion sensitivities for the ginsenosides were greater in the negative‐ion mode, but more structural information on the ...
Chris D. Metcalfe, Raymond E. March, Xiu-Sheng Miao, Chunyan Hao   +3 more
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