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Mass Spectrometry: Principles and Applications
Preface. Introduction. Ion Sources. Mass Analyzers. Tandem Mass Spectrometry (MS/MS). Mass Spectrometry/Chromatography Coupling. Analytical Informaiton. Fragmentation Reactions. Analysis ofExpand
Determination of flavone, flavonol, and flavanone aglycones by negative ion liquid chromatography electrospray ion trap mass spectrometry
The negative ion mode was a powerful complementary tool of the positive ion mode for the structural characterization of flavonoid aglycones by ESI-MS/MS, and several structurally informative anions appeared highly specific of thenegative ion mode. Expand
Tandem mass spectrometry: A primer
Tandem mass spectrometry (MS/MS) employs two stages of mass analysis in order to examine selectively the fragmentation of particular ions in a mixture of ions. The various types of instruments whichExpand
Collision-induced dissociation of alkali metal cationized and permethylated oligosaccharides: Influence of the collision energy and of the collision gas for the assignment of linkage position
Tandem mass spectrometry has been used to study the collision-induced decomposition of [M+Na]+ ions of permethylated oligosaccharides. It is shown that many linkage positions in one compound may beExpand
Structure of Chelerythrine Base
The structure of chelerythrine free base was examined. When chelerythrine chloride [1b] was treated with aqueous K2CO3 solution, bis[6-(5,6-dihydrochelerythrinyl)] ether [3] was obtained. An excessExpand
Non-injured maize contains several 1,4-benzoxazin-3-one related compounds but only as glucoconjugates
DIMBOA (2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one) and its derivatives are known to participate in the resistance of the Poaceae to several pests. A more efficient analytical method for theExpand
Gas phase reaction of neutral carbon disulfide with its hydride adduct anions: Tandem mass spectrometry and theoretical studies
In a chemical ionization source with CH4/N2O, carbon disulfide (CS2) yields its radical anion by electron capture and CHS2- by hydride attachment, By combining tandem mass spectrometric experimentsExpand
Oxidative catabolism of α-tocopherol in rat liver microsomes
The goal of this study was to clarify the mechanism responsible for the catabolism of α-tocopherol. The vitamin, bound to albumin, was incubated with rat liver microsomes and appeared to be brokenExpand
Study of the thermal evolution of the cyclic‐oligomer formation in a cyclic‐oligomer‐free PET
A low percentage of cyclic oligomers can be found in poly(ethylene terephthalate) (PET) from its synthesis onward. In this article, a cyclic-oligomer-fr ee PET (COFP) obtained by solvent extractionExpand
The hydroxamate of valproic acid, a compound produced by oximation of urine from patients under valproic therapy.
A previously unreported substance, detected by gas chromatography after oximation of urine from patients receiving valproic acid, was isolated and analysed by mass spectrometry and nuclear magneticExpand