Direct and simultaneous determination of reduced and oxidized glutathione and homoglutathione by liquid chromatography–electrospray/mass spectrometry in plant tissue extracts

2006 ◽  
Vol 356 (2) ◽  
pp. 254-264 ◽  
Author(s):  
Rubén Rellán-Álvarez ◽  
Luis E. Hernández ◽  
Javier Abadía ◽  
Ana Álvarez-Fernández
Keyword(s):  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
Simultaneous Determination ◽  
Plant Tissue ◽  
Electrospray Mass Spectrometry ◽  
Oxidized Glutathione ◽  
Tissue Extracts ◽  
Reduced And Oxidized Glutathione

Simultaneous determination of albendazole metabolites, praziquantel and its metabolite in plasma by high-performance liquid chromatography–electrospray mass spectrometry

2007 ◽  
Vol 44 (2) ◽  
pp. 558-563 ◽  
Author(s):  
Pierina Sueli Bonato ◽  
Anderson Rodrigo Moraes de Oliveira ◽  
Fernando José Malagueño de Santana ◽  
Bruno José Dumet Fernandes ◽  
Vera Lucia Lanchote ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Simultaneous Determination ◽  
High Performance ◽  
Electrospray Mass Spectrometry

Simultaneous Multiresidue Analysis of (β-Lactam Antibiotics in Bovine Milk by Liquid Chromatography with Ultraviolet Detection and Confirmation by Electrospray Mass Spectrometry

1994 ◽  
Vol 77 (5) ◽  
pp. 1122-1131 ◽  
Author(s):  
Krystyna L Tyczkowska ◽  
Robert D Voyksner ◽  
Rolf F Straub ◽  
Arthur L Aronson
Keyword(s):  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
Simultaneous Determination ◽  
Electrospray Mass Spectrometry ◽  
Limit Of Detection ◽  
Water Solution ◽  
Bovine Milk ◽  
Penicillin G ◽  
Array Detector

Abstract A multiresidue analytical method was developed for the simultaneous determination of amoxicillin, cephapirin, procaine penicillin G, ampicil-lin, cloxacillin, and ceftiofur in bovine milk. The method involved ultrafiltration of milk diluted with an equal volume of 50% acetonitrile through a 10 000 dalton molecular mass cutoff filter. Separation of these β-lactam antibiotics from other milk components was performed by ion-paired (octane- and dodecanesulfonate) liquid chromatography using a phenyl column eluted with acetonitrile-water solution. Ultraviolet ab-sorbance of the column effluent was monitored in the 200-350 nm range of a photodiode-array detector. For quantitation, the chromatograms were acquired at λ210 nm for penicillin G, am-picillin, and cloxacillin; λ230 nm for amoxicillin; and λ290 for cephapirin, procaine, and ceftiofur. The limit of detection for the simultaneous determination of these antibiotics was estimated to be 100 ppb. Liquid chromatography/electrospray mass spectrometry could be used to confirm these antibiotics for quantities down to 100 pg entering the mass spectrometer.

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