Extraction Standard Solution, in nonane/6.8% toluene, 1,2ml

Methylphenidate

GC-IRMS Standards (C25 (?13C: -28.21); C30 (?13C: -28.60); C36 (?13C: -26.15)), 150µg/mL, Solvent-cyclohexane, Unit 1mL, # of units-5, Cas.no.

Methyl methacrylate,1000 µg/mL,MeOH,1mL,