A Novel HPLC-MS Method for Analysis of Plasma Sterols

A Novel Liquid Chromatography/Mass Spectrometry Method for Analysis of Plasma Sterol Concentrations

Localization and Interactions of Melatonin in Cell Membrane Models

Studies in organic mass spectrometry. Part 27. Electron ionisation induced isomerisation of 3-aryl-4(3H)-quinazolinones

The comparison between 70 eV EI (electron ionisation) mass spectra, MIKE (mass analysed ion kinetic energy) and CID (collision induced dissociation) MIKE spectra, KER (kinetic energy release) and KERD (kinetic energy release distribution) data for 2-methyl-3-aryl-4(3H)-quinazolinones 1-4, with those of the corresponding 2-methyl-4-aryloxyquinazolines 1′-4′, indicates that aryloxy radical as well as hydrogen or methyl radical losses involve the formation of common intermediates. This suggests the occurrence of migrations of aryl groups from the N-3 atom to carboxylic oxygen in the molecular ions of 1-4.

A simple High Performance Liquid Chromatography-Mass spectrometry approach combined with Linear Discriminant Analysis for the characterization of top quality olive oils