“…More recently, both normal-phase and reversed-phase HPLC have been found to be useful for the separation of PAH (14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25). Wise et al (14) reported the use of normal-phase /tBondapak NH2 for the separation of PAH according to the number of aromatic rings regardless of the type of alkyl 1 Present address: Chevron Research Co., Richmond, CA 94802. 0003-2700/83/0355-0225$01.50/0 substitution.…”