Journal of pharmaceutical and biomedical analysis, 70, 529-533 (2012-06-01)
This work proposes a liquid chromatography-electrospray ionization ion trap mass spectrometry (LC-ESI-ITMS) method, for the quantification of sildenafil (SDF), tadalafil (TDF) and vardenafil (VDF) and their metabolites N-desmethylSDF, O-desethylSDF and N-desethylVDF, preceded by a sample preparation step based on protein
Journal of chromatography. A, 1240, 21-28 (2012-04-17)
Fractionation of biological fluids for proper analysis by LC-MS of low-abundance metabolites in the presence of high-abundant endogenous metabolites is of interest, particularly when the latter cause undesirable phenomena such as ionization suppression, as is the case with phospholipids (PLs).
Solid-phase extraction of phosphorous-containing amino acid herbicides from biological specimens with a zirconia-coated silica cartridge
Watanabe, D., et al.
Journal of Chromatography. B, Biomedical Applications, 969, 69-76 (2014)
Quantitative determination of capecitabine and its six metabolites in human plasma using liquid chromatography coupled to electrospray tandem mass spectrometry
Deenen, M, et al.
Journal of Chromatography. B, Biomedical Applications, 913-914, 30-40 (2013)
A simple method to enrich phospholipids from plasma samples, involving a HybridSPE-PPT 96-well plate that both retains phospholipids and removes precipitated proteins.