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Schematic diagram of the LIAD/SVUV PI QTOF mass spectrometer. The inset shows a schematic representation of desorption and photoionization process for the LIAD/SVUV PI QTOF mass spectrometry analysis.
LIAD/SVUV PI mass spectra of ergosterol at different photon energies of (a) 8.50 eV, (b) 9.50 eV, (c) 14.00 eV.
LIAD/SVUV PI mass spectra of (a) double-decker lanthanide phthalocyanine and (b) triple-decker lanthanide phthalocyanine at photon energy of 11.00 eV. Inset: an expanded view of the molecular ion.
LIAD/SVUV PI mass spectra of aromatics separated from heavy oils after hydrotreating (a)–(c) and without hydrotreating (d)–(f): (a) and (d) at photon energy of 9.00 eV, (b) and (e) at photon energy of 11.00 eV, and (c) and (f) at photon energy of 14.00 eV.
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