Oxcarbazepine, 100ug/ml, 5ml in MeOH

Ipronidazole-hydroxy, 100 µg/ml, Methanol, 1ml

Dibenzothiophene-d8, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 33262-29-2

EPA Method 524.3 - Internal Standard