Abstract
Ketones are major oxygen-containing compounds in low-temperature coal tars (LTCTs); however, the molecular composition of these compounds is not well characterized as a result of the complexity of itself and the interference of the coal tar matrix. In this study, ketones were separated from a LTCT and characterized by Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS), Orbitrap mass spectrometry (Orbitrap MS), and gas chromatography–mass spectrometry (GC–MS). Isolation of ketones was carried out by a chemical derivatization process with Girard T reagent and followed by a hydrolysis process of the derivatives. The Girard T reagent reacted with ketones under weakly acidic conditions and introduced a charged quaternary ammonium moiety on carbonyl to form water-soluble hydrazones, which can be separated from a complex matrix through an extrography separation and have a strong response in a positive-ion electrospray ionization (ESI) source for mass spectrometric analysis. The isolated deri...
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