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Your search keyword '"Cesar E. Ramirez"' showing total 3 results
Start Over Author "Cesar E. Ramirez" Publisher american chemical society (acs)
3 results on '"Cesar E. Ramirez"'

2. Characterization of Deasphalted Crude Oils Using Gas Chromatography–Atmospheric Pressure Laser Ionization–Trapped Ion Mobility Spectrometry–Time-of-Flight Mass Spectrometry

Author

Cesar E. Ramirez, Francisco Fernandez-Lima, and Clement A. Olanrewaju

Subjects
Fuel Technology, Ion-mobility spectrometry, Chemistry, General Chemical Engineering, Analytical chemistry, Energy Engineering and Power Technology, Gas chromatography, Time-of-flight mass spectrometry, Atmospheric-pressure laser ionization, Characterization (materials science)
Published
2021
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3. Comprehensive Screening of Polycyclic Aromatic Hydrocarbons and Similar Compounds Using GC–APLI–TIMS–TOFMS/GC–EI–MS

Author

Francisco Fernandez-Lima, Clement A. Olanrewaju, and Cesar E. Ramirez

Subjects
Chromatography, Chemistry, 010401 analytical chemistry, Polyatomic ion, 010402 general chemistry, Mass spectrometry, 01 natural sciences, Chemical formula, 0104 chemical sciences, Analytical Chemistry, Atmospheric-pressure laser ionization, Fragmentation (mass spectrometry), Kovats retention index, Gas chromatography, Electron ionization
Abstract

In the present work, a novel workflow based on complementary gas-phase separations for the identification of isomeric PAHs from complex mixtures is described. This is the first report on the coupling of gas chromatography (GC), atmospheric pressure laser ionization (APLI), and trapped ion mobility spectrometry-mass spectrometry (TIMS-MS) for the characterization of polycyclic aromatic hydrocarbons. Over a hundred known unknowns are uniquely identified based on the molecular ion retention indices I (5%), mobility (RSD < 0.6% and R = 50-90 with Sr = 0.18 V/ms), mobility-based theoretical candidate assignment (

Published
2021
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