Electron impact ionized purine bases such as caffeine and its metabolites (theophylline, theobromine, paraxanthine, 1-methylxanthine, 3-methylxanthine and 7-methylxanthine) were characterized by tandem mass spectrometry. The direct analysis of human urinary extracts by tandem mass spectrometry allows the unambiguous identification of caffeine and its metabolites present simultaneously in the urine
Liguori, A., Mascaro, P., Porcelli, B., Sindona, G., Uccella, N. (1991). Identification of caffeine and its metabolites in human urine extracts by electron ionization tandem spectrometry. OMS, ORGANIC MASS SPECTROMETRY, 26(6), 608-612 [10.1002/oms.1210260613].
Identification of caffeine and its metabolites in human urine extracts by electron ionization tandem spectrometry
PORCELLI, BRUNETTA;
1991-01-01
Abstract
Electron impact ionized purine bases such as caffeine and its metabolites (theophylline, theobromine, paraxanthine, 1-methylxanthine, 3-methylxanthine and 7-methylxanthine) were characterized by tandem mass spectrometry. The direct analysis of human urinary extracts by tandem mass spectrometry allows the unambiguous identification of caffeine and its metabolites present simultaneously in the urine
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https://hdl.handle.net/11365/10903
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