I am doing normal phase PAH analysis by HPLC/DAD using hexane, then switching to MTBE to elute the more complex molecules. The column is an analytical scale NH2. The std is a EPA 610 PAH mix but the Cert. of Analysis uses GC to analyse and show elution order. My question is, is the elution order the same, and if not, does anyone know of a std of this type for HPLC, or do I need individual stds for each component in the mix.

The usual approach for this is reversed-phase HPLC on special columns designed for this analysis. They then also come with a certificate of analysis that shows the elution order.
I am not aware of a standard chromatogram on a NH2 column. The only think that I remember is a rule of thumb saying that the elution time increases with the number of rings, and that similar ring numbers are grouped together.

Some additional information: the sample matrix is light gas oil from a hydrotreating reactor. Previous work was done using this column/method so I must use same setup. I will try to get this info from the previous operator.