Journal
RAPID COMMUNICATIONS IN MASS SPECTROMETRY
Volume 17, Issue 12, Pages 1339-1343Publisher
WILEY
DOI: 10.1002/rcm.1051
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The feasibility of atmospheric pressure desorption/ionization on silicon mass spectrometry (AP-DIOS-MS) for drug analysis was investigated. It was observed that only compounds with relative high proton affinity are efficiently ionized under AP-DIOS conditions. The limits of detection (LODs) achieved in MS mode with midazolam, propranolol, and angiotensin II were 80fmol, 20 pmol, and 1 pmol, respectively. In MS/MS mode the LODs for midazolam, and propranolol were 10fmol and 5pmol, respectively. The good linearity (r(2) > 0.991), linear dynamic range of 3 orders of magnitude, and reasonable repeatability showed that the method is suitable for quantitative analysis. Copyright (C) 2003 John Wiley Sons, Ltd.
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