Internal standard 2, 2000g/ml in MeOH, 1ml

4,4'-Difluorobenzophenone, 100mg

Naproxen, neat, Solvent-neat, Unit 100mg, # of units-1, Cas.no. 22204-53-1

Perfluorooctane sulfonic acid , 50ug/ml, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 1763-23-1