Internal Standard

3-Chloro-1,2-propandiol-2-monogadolenate, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no.

Purified asfalthenes from North Sea Oil, neat, Solvent-neat, Unit 100mg, # of units-1, Cas.no.

Propylbenzene, 1000mg