you can using benzene :methanol ,1:1

You can use GC or HPLC

But For GC the best solvent is hexane or DCM.

Regards

Dear Dr. Ali 

You mean this solvent for HPLC?.

 Hexane:Acetone 1:1 or DCM are best for GC.

I personally prefer GC-MS to HPLC for PAHs. If you are going to run PAHs in air then you are trapping them on some sort of media (XAD, filters, etc.). You'll need to extract them off of the resin or filter, which you typically do using methylene chloride (DCM). 

You can blow down the DCM and bring the PAHs back in acetone, then dilute the acetone and run SPE if you wish. I don't think you'll have enough interferences in air samples to warrant the SPE cleanup. I have run hundreds of air samples and never had to resort to SPE - it really is more of a concentration method for water than for air.

If you do not have GC-MS (i.e..,  you have GC-FID or PID) then I would move to HPLC. Again, if you have GC-MS then I personally prefer that to HPLC. If you move to HPLC then you need to exchange solvents, so you would dry down the DCM and reconstitute in methanol. 

thank you #Mark Krause for the full information.