Reversed-Phase HPLC Retention Behavior of Coal-Related Nitrogen Heterocyclic Compounds

Correlation of liquid chromatographic retention times with molecular structures of coal liquid components

“…Good correlations between isocratic RPLC retention and molecular structure descriptors have been reported (36)(37)(38)(39)(40)(41). However, unlike this work, the reported work was limited to isocratic elution and to single classes of compounds, e.g., PAHs or nitrogen heterocyclic aromatics.…”

Hydrophilic complexes with protons and metallic ions in the reversed-phase liquid chromatography of azaarenes

“…Azaarenes have been identified in various sources such as tobacco smoke (1-3), automobile exhausts (4), heavy fractions of petroleum distillates (5), crude oil (6), shale oil (7), coal (8), and recent lake sediments (9). These compounds exhibit carcinogenic and mutagenic activities (10), act as poisons of reforming catalysts (11), and contribute to the instability of fuel during storage (12)(13)(14).…”