Determination of caffeine and its metabolites in urine by capillary electrophoresis-mass spectrometry
โ Scribed by Unita L. Peri-Okonny; Shao Xiong Wang; R. John Stubbs; Norberto A. Guzman
- Publisher
- John Wiley and Sons
- Year
- 2005
- Tongue
- English
- Weight
- 453 KB
- Volume
- 26
- Category
- Article
- ISSN
- 0173-0835
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Electron impact ionized purine bases such as caffeine and its metabolites (theophylline, theobromine, paraxanthine, 1-metbylxanthiw, 3methylxnntbine and 7-metbylxanthiw) were characterized by tandem mass spectrometry. The direct analysis of human urinary extracts by tandem mass spectrometry allows t