Results 31 to 40 of about 149,784 (296)

Fabricating an Electrospray Ionization Chip Based on Induced Polarization and Liquid Splitting

open access: yesMicromachines, 2021
The coupling of the microfluidic chip to mass spectrometry (MS) has attracted considerable attention in the area of chemical and biological analysis.
Lvhan Zhou   +6 more
doaj   +1 more source

Recent Applications of Ambient Ionization Mass Spectrometry for Environmental Pollutant Detection [PDF]

open access: yesZhipu Xuebao, 2023
Along with the industrial development and human society progress, large number of pollutants have been discharged to induce the environmental pollution, which have attracted global attentions.
QIN Jing-yi, OUYANG Jin, NA Na
doaj   +1 more source

Direct Ambient Analysis of Pharmaceutical and Ecstasy Tablets

open access: yesCHIMIA, 2006
Desorption electrospray ionization (DESI) is a new ionization technique recently introduced in analytical chemistry for the ambient analysis of surfaces by mass spectrometry.
Luc Alexis Leuthold   +6 more
doaj   +1 more source

The Flexible Microtube Plasma as Post-Ionization Source for Cholesterol in nano-Electrospray Mass Spectrometry [PDF]

open access: yes, 2021
Cholesterol serves as a biomarker in clinical- and life-sciences. The determination of abnormal levels can indicate several types of human diseases.
Daniel, Foest   +5 more
core   +1 more source

An Organic Chemist’s Guide to Electrospray Mass Spectrometric Structure Elucidation

open access: yesMolecules, 2019
Tandem mass spectrometry is an important tool for structure elucidation of natural and synthetic organic products. Fragmentation of odd electron ions (OE+) generated by electron ionization (EI) was extensively studied in the last few decades, however ...
Arnold Steckel, Gitta Schlosser
doaj   +1 more source

Implications of Matrix Effects in Quantitative HPLC/ESI-ToF-MS Analyses of Atmospheric Organic Aerosols

open access: yesProceedings, 2020
Matrix-induced signal suppression or enhancements are known phenomena in electrospray ionization mass spectrometry. Very few studies report on method development for organic aerosols analyses with the evaluation of the matrix effects.
Cornelia Amarandei   +2 more
doaj   +1 more source

Identification of Monohexosylceramides From by Electrospray Ionization Mass Spectrometry

open access: yesNatural Product Communications, 2020
To date, the monohexosylceramides present in the eukaryotic alga Euglena gracilis has not been reported. In this study, we extracted and purified a lipid fraction that eluted similarly to other reported monohexosylceramides.
Nairui Zhang   +7 more
doaj   +1 more source

Strategy to rapidly discriminate trace isomeric lignan compounds from Gymnotheca chinensis by probe electrospray ionization tandem mass spectrometry [PDF]

open access: yes, 2015
Probe electrospray ionization (PESO is a recently developed ionization technique based on electrospray ionization (ESI) that generates electrospray from the tip of a solid needle.
Liu, Jie   +7 more
core   +1 more source

Electrospray Ionization Mass Spectrometry: A Technique to Access the Information beyond the Molecular Weight of the Analyte

open access: yesInternational Journal of Analytical Chemistry, 2012
The Electrospray Ionization (ESI) is a soft ionization technique extensively used for production of gas phase ions (without fragmentation) of thermally labile large supramolecules.
Shibdas Banerjee, Shyamalava Mazumdar
doaj   +1 more source

Enhanced ionization in electrospray ionization mass spectrometry of labile end-group-containing polystyrenes using silver(I) tetrafluoroborate as doping salt [PDF]

open access: yes, 2008
The use of silver tetrafluoroborate as a doping salt to achieve efficient and soft desorption/ionization of labile end-group-carrying polystyrene during electrospray ionization is demonstrated.
Davis, Thomas P.   +9 more
core   +1 more source

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