Results 281 to 290 of about 723,036 (331)
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Journal of Mass Spectrometry, 2015
Electrospray ionization (ESI) is the most common ionization method in atmospheric pressure ionization mass spectrometry because of its easy use and handling and because a diverse range of components can be effectively ionized from high to medium polarity.
Lilla Molnárné Guricza, W. Schrader
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Electrospray ionization (ESI) is the most common ionization method in atmospheric pressure ionization mass spectrometry because of its easy use and handling and because a diverse range of components can be effectively ionized from high to medium polarity.
Lilla Molnárné Guricza, W. Schrader
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Mechanistic aspects of electrospray ionization
Journal of Chromatography A, 1998Abstract Electrospray ionization (ESI) mass spectrometry can be divided into three steps: Nebulization of a sample solution into electrically charged droplets, liberation of ions from droplets, and transportation of ions from the atmospheric pressure ionization source region into the vacuum and mass analyzer of the mass spectrometer.
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Electrospray Ionization Using Wooden Tips
Analytical Chemistry, 2011Electrospray ionization (ESI) is a mass spectrometric technique widely used in various fields including chemistry, biology, medicine, pharmaceutical industry, clinical assessment, and forensic science. In this study, we report a simple and economical ESI-mass spectrometry (MS) technique, which makes use of disposable wooden tips (wooden toothpicks) for
Bin Hu +3 more
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Annual Review of Biochemistry, 2014
Lipidomics aims to quantitatively define lipid classes, including their molecular species, in biological systems. Lipidomics has experienced rapid progress, mainly because of continuous technical advances in instrumentation that are now enabling ...
B. Brügger
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Lipidomics aims to quantitatively define lipid classes, including their molecular species, in biological systems. Lipidomics has experienced rapid progress, mainly because of continuous technical advances in instrumentation that are now enabling ...
B. Brügger
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Desorption electrospray ionization of aerosol particles
Rapid Communications in Mass Spectrometry, 2007AbstractWe have applied desorption electrospray ionization to aerosol particles. Ions were formed from aerosols by merging suspended dry particles with an electrospray of solvent in a modified ion trap mass spectrometer. Dry aerosol particles were generated using a fluidized bed powder disperser and directed toward the inlet of the mass spectrometer. A
Yohannes H. Rezenom +2 more
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An Electrospray Ionization Source for Integration with Microfluidics
Analytical Chemistry, 2002We have demonstrated a new electrospray ionization (ESI) device incorporating a tip made from a shaped thin film, bonded to a microfluidic channel, and interfaced to a time-of-flight mass spectrometer (TOFMS). A triangular-shaped thin polymer tip was formed by lithography and etching.
David A. Czaplewski +5 more
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Negative electrospray ionization via deprotonation: predicting the ionization efficiency.
Analytical Chemistry, 2014Electrospray ionization (ESI) in the negative ion mode has received less attention in fundamental studies than the positive ion electrospray ionization. In this paper, we study the efficiency of negative ion formation in the ESI source via deprotonation ...
A. Kruve +3 more
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Integration of electropreconcentration and electrospray ionization in a microchip
Journal of Chromatography A, 2018A microfluidic glass chip for performing sensitive mass spectrometry (MS) is developed by integrating nanochannel-based electropreconcentration with electrospray ionization (ESI). Cation analytes in acidic buffer conditions (∼pH 3) were preconcentrated at a micro-nano-microchannel junction where a positively charged polymer, polyE-323, is coated to ...
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Electrospray Ionization Mass Spectrometry of Oligonucleotides
Current Protocols in Nucleic Acid Chemistry, 2008AbstractBecause of the high molecular weights and thermal lability of biomolecules such as nucleic acids and protein, they can be difficult to analyze by mass spectrometry. Such analyses require a “soft” ionization method that is capable of generating intact molecular ions.
Colette M. Castleberry +2 more
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Analytical Chemistry, 2014
Mass spectrometry imaging (MSI) has been extensively used for determining spatial distributions of molecules in biological samples, and there is increasing interest in using MSI for quantification. Nanospray desorption electrospray ionization (nano-DESI)
Ingela Lanekoff +2 more
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Mass spectrometry imaging (MSI) has been extensively used for determining spatial distributions of molecules in biological samples, and there is increasing interest in using MSI for quantification. Nanospray desorption electrospray ionization (nano-DESI)
Ingela Lanekoff +2 more
semanticscholar +1 more source