Results 261 to 270 of about 195,406 (308)

Surfactants Usable for Electrospray Ionization Mass Spectrometry

Analytical Biochemistry, 2000
Surfactants suppress the electrospray ionization (ESI) of various compounds. Here we demonstrate that fluorinated surfactants such as perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOSA) could be employed for ESI-MS without a significant decrease in sensitivity.
Y, Ishihama, H, Katayama, N, Asakawa
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Electrospray ionization mass spectrometry fingerprinting of beer

The Analyst, 2005
After just simple degassing, dilution, pH adjustment and direct flow injection, characteristic fingerprint spectra of beer samples have been obtained by fast (few seconds) electrospray ionization mass spectrometry (ESI-MS) analysis in both the negative and positive ion modes.
Alexssander S, Araújo, Lilian L, da Rocha, Daniela M, Tomazela, Alexandra C H F, Sawaya, Reinaldo R, Almeida, Rodrigo R, Catharino, Marcos N, Eberlin   +6 more
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Electrospray ionization mass spectrometry fingerprinting of propolis

The Analyst, 2004
Crude ethanolic extracts of propolis, a natural resin, have been directly analysed using electrospray ionization mass (ESI-MS) and tandem mass spectrometry (ESI-MS/MS) in the negative ion mode. European, North American and African samples have been analyzed, but emphasis has been given to Brazilian propolis which displays diverse and region-dependent ...
Alexandra C H F, Sawaya, Daniela M, Tomazela, Ildenize B S, Cunha, Vassya S, Bankova, Maria C, Marcucci, Angela R, Custodio, Marcos N, Eberlin   +6 more
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Conformational effects in protein electrospray‐ionization mass spectrometry

Mass Spectrometry Reviews, 2015
Electrospray‐ionization mass spectrometry (ESI‐MS) is a key tool of structural biology, complementing the information delivered by conventional biochemical and biophysical methods. Yet, the mechanism behind the conformational effects in protein ESI‐MS is an object of debate.
Li, J, SANTAMBROGIO, CARLO, BROCCA, STEFANIA, Rossetti, G, Carloni, P, GRANDORI, RITA   +5 more
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Electrospray Ionization High-Resolution Ion Mobility Spectrometry−Mass Spectrometry

Analytical Chemistry, 1998
A hybrid atmospheric pressure ion mobility spectrometer is described which exhibits resolving power approaching the diffusion limit for singly and multiply charged ions (over 200 for the most favorable case). Using an electrospray ionization source and a downstream quadrupole mass spectrometer with electron multiplier as detector, this ESI-IMS-MS ...
C, Wu, W F, Siems, G R, Asbury, H H, Hill   +3 more
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Ion suppression effect in desorption electrospray ionization and electrospray ionization mass spectrometry

Rapid Communications in Mass Spectrometry, 2017
Rationale Although 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.
Zheng Wang, Haijing Zhu, Guangming Huang
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Determination of micelle mass by electrospray ionization mass spectrometry

Journal of Mass Spectrometry, 2005
AbstractBy electrospray ionization (ESI) mass spectrometry, micelle solutions of sodium cholate were investigated in detail in the presence and absence of ethanol. The average aggregation number could be evaluated from the spectra acquired under conditions where soft collisions adequate to measure the micelle solution were induced, and the value agreed
Daisuke, Nohara, Takatomo, Kajiura, Koji, Takeda   +2 more
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Solvent gradient electrospray for laser ablation electrospray ionization mass spectrometry

The Analyst, 2017
Changing spray solution polarity in a gradient electrospray improves molecular coverage in LAESI-MS analysis of biological samples.
Hang Li, Akos Vertes
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Capillary electrophoresis-electrospray ionization-mass spectrometry

Journal of Chromatography A, 1989
Abstract New developments are described in the area of capillary electrophoresis combined with electrospray ionization-mass spectrometry (CE—ESI-MSD), a promising new method for the separation and mass spectrometric characterization of labile, polar or ionic constituents of biological mixtures.
C.G. Edmonds, J.A. Loo, C.J. Barinaga, H.R. Udseth, R.D. Smith   +4 more
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Mass spectrometry using electrospray ionization

Nature Reviews Methods Primers, 2023
Gurpur Rakesh D. Prabhu, Evan R. Williams, Matthias Wilm, Pawel L. Urban   +3 more
openaire   +2 more sources