A Method for Quantitating the Intracellular Metabolism of AZT Amino Acid Phosphoramidate Pronucleotides by Capillary High-Performance Liquid Chromatography−Electrospray Ionization Mass Spectrometry

2005 ◽  
Vol 2 (3) ◽  
pp. 233-241 ◽  
Author(s):  
Jisook Kim ◽  
Soobong Park ◽  
Natalia Y. Tretyakova ◽  
Carston R. Wagner
Keyword(s):  
Mass Spectrometry ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Amino Acid ◽  
Electrospray Ionization ◽  
Electrospray Ionization Mass Spectrometry ◽  
High Performance ◽  
Ionization Mass Spectrometry ◽  
Ionization Mass ◽  
Intracellular Metabolism

Determination of mazindol in human oral fluid by high performance liquid chromatography-electrospray ionization mass spectrometry

2014 ◽  
Vol 28 (8) ◽  
pp. 1064-1069 ◽  
Author(s):  
Marcella Herbstrith de Oliveira ◽  
Graciela Carlos ◽  
Ana Maria Bergold ◽  
Flavio Pechansky ◽  
Renata Pereira Limberger ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Electrospray Ionization ◽  
Electrospray Ionization Mass Spectrometry ◽  
High Performance ◽  
Oral Fluid ◽  
Ionization Mass Spectrometry ◽  
Ionization Mass

scholarly journals Multiresidue Determination and Confirmation of Imidazolinone Herbicides in Soil by High-Performance Liquid Chromatography/Electrospray Ionization Mass Spectrometry

1999 ◽  
Vol 82 (4) ◽  
pp. 956-962 ◽  
Author(s):  
Alexander J Krynitsky ◽  
Steven J Stout ◽  
Huns Nejad ◽  
Thomas C Cavalier
Keyword(s):  
Mass Spectrometry ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Electrospray Ionization ◽  
Electrospray Ionization Mass Spectrometry ◽  
High Performance ◽  
Ionization Mass Spectrometry ◽  
Ionization Mass ◽  
Limit Of Quantitation ◽  
Imidazolinone Herbicides

Abstract A new multiresidue method was developed to determine 6 imidazolinone herbicides in 5 different soil types, using high-performance liquid chromatography/electrospray ionization mass spectrometry (HPLC/ESMS). Good recoveries and sensitivity were obtained for the compounds investigated at the 2.0 ppb limit of quantitation. A 50 g portion of soil was extracted with 0.5N NaOH. A portion of the extract was acidified to precipitate humic acids, and the supernatant was loaded onto a preconditioned tC-18 solid-phase extraction (SPE) cartridge and eluted with ethyl acetate. Further cleanup was achieved by using a tandem strong-anion-ex- change SPE/strong-cation-exchange (SCX) SPE. Analytes were eluted from the SCX SPE with saturated KCI in methanol. After cleanup, the sample was desalted with an RP-102 SPE cartridge. Quantitation was achieved by monitoring the [M + H]+ ions for each compound, with a time-scheduled selective-ion-monitoring program (positive mode). The extraction and cleanup procedure produced a purified extract for MS confirmation using 3 ions with “in-source” collision-induced dissociation.

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