Table 2: Relative retention times of PAHs with different numbers of rings on the LCP column, their boiling points, and their L/B ratios.

CompoundsTemperatureRelative retention timeBoiling point (°C) L/B

Two rings170°C isocratic
 Naphthalene (1) 1217.91.242
 Biphenyl (2) 1.111255.0
 Diphenylmethane (3) 1.141264.5
Three rings170°C isocratic
 Acenaphthene (4) 1279
 Fluorene (5) 1.3542951.399
 Phenanthrene (6) 2.7413401.459
 Anthracene (7) 3.2403421.559
Four rings220°C isocratic
 Fluoranthene (8) 13841.142
 Pyrene (9) 1.2034041.119
 Triphenylene (10) 3.3034251.12
 Benz[a]anthracene (11) 3.692437.61.58
 Chrysene (12) 4.2874481.72
Five rings230°C isocratic
 Benzo[a]pyrene (13) 14951.149
 Dibenz[a,h]anthracene (14) 1.4675241.782