Characterization of Isomeric 1,2,4-Oxadiazolyl-N-Methylpyridinium Salts by Electrospray Ionization Tandem Mass Spectrometry

2007 ◽  
Vol 13 (3) ◽  
pp. 199-205 ◽  
Author(s):  
Giuseppe Avellone ◽  
David Bongiorno ◽  
Silvestre Buscemi ◽  
Leopoldo Ceraulo ◽  
Serena Indelicato ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Tandem Mass Spectrometry ◽  
Electrospray Ionization ◽  
Catalytic Properties ◽  
Tandem Mass ◽  
Green Solvents ◽  
Esi Ms ◽  
Mass Spectrometric Behavior ◽  
Ionization Tandem Mass Spectrometry

The mass spectrometric behavior of 1,2,4-oxadiazolyl- N-methylpyridinium salts has been investigated. These substances are of current interest as perspective ionic liquids, compounds used as green solvents for synthesis, and for their catalytic properties. The studies have been developed through electrospray ionization tandem mass spectrometry (ESI-MS/MS) experiments. The obtained results demonstrate a ready distinction between the two isomeric classes, 3- N-methylpyridinium- and 5- N-methylpyridinium-1,2,4-oxadiazoles, is possible through ESI-MS/MS experiments. A deeper investigation on the principal fragmentation pathways of characteristic ions has been also developed.

Characterization of Nα-Fmoc-protected ureidopeptides by electrospray ionization tandem mass spectrometry (ESI-MS/MS): differentiation of positional isomers

2010 ◽  
Vol 45 (12) ◽  
pp. 1461-1472 ◽  
Author(s):  
M. Ramesh ◽  
B. Raju ◽  
R. Srinivas ◽  
V. V. Sureshbabu ◽  
N. Narendra ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Tandem Mass Spectrometry ◽  
Electrospray Ionization ◽  
Tandem Mass ◽  
Positional Isomers ◽  
Esi Ms ◽  
Ionization Tandem Mass Spectrometry

Direct sequencing of a disulfide-linked peptide with electrospray ionization tandem mass spectrometry

The Analyst ◽  
2015 ◽  
Vol 140 (8) ◽  
pp. 2623-2627 ◽  
Author(s):  
Gongyu Li ◽  
Jiying Pei ◽  
Yue Yin ◽  
Guangming Huang
Keyword(s):  
Mass Spectrometry ◽  
Tandem Mass Spectrometry ◽  
Corona Discharge ◽  
Electrospray Ionization ◽  
Disulfide Bonds ◽  
Direct Sequencing ◽  
Peptide Sequencing ◽  
Tandem Mass ◽  
Esi Ms ◽  
Ionization Tandem Mass Spectrometry

Enhanced corona discharge was employed for in-spray dissociation of disulfide bonds, facilitating disulfide-containing peptide sequencing with ESI-MS/MS.

Fragmentation pathway and structural characterization of new glycosylated phenolic derivatives fromEremanthus glomerulatusLess (Asteraceae) by electrospray ionization tandem mass spectrometry

2017 ◽  
Vol 52 (11) ◽  
pp. 783-787 ◽  
Author(s):  
Juliano Geraldo Amaral ◽  
Anelize Bauermeister ◽  
Alan Cesar Pilon ◽  
Dayana Rubio Gouvea ◽  
Humberto Takeshi Sakamoto ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Tandem Mass Spectrometry ◽  
Electrospray Ionization ◽  
Structural Characterization ◽  
Fragmentation Pathway ◽  
Tandem Mass ◽  
Phenolic Derivatives ◽  
Ionization Tandem Mass Spectrometry

Fingerprint analysis of Oxytropis falcate using ultra-performance liquid chromatography–electrospray ionization tandem mass spectrometry (UPLC-ESI-MS)

2015 ◽  
Vol 7 (16) ◽  
pp. 6810-6820
Author(s):  
Tang-Juan Zhao ◽  
Juan Chen ◽  
Yan-Ping Shi
Keyword(s):  
Mass Spectrometry ◽  
Quality Control ◽  
Liquid Chromatography ◽  
Tandem Mass Spectrometry ◽  
Electrospray Ionization ◽  
Ultra Performance Liquid Chromatography ◽  
Tandem Mass ◽  
Fingerprint Analysis ◽  
Esi Ms ◽  
Ionization Tandem Mass Spectrometry

Fingerprint analysis ofOxytropis falcateBunge using UPLC-ESI-MS was proposed for its quality control.

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