Caffeine, 1000µg/ml in MeOH, 1ml

Metronidazole, 100 µg/ml, Acetonitrile, 1ml

2-Methyl-1-naphthol, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 7469-77-4

2,4'-DDD, 100 µg/ml, Methanol, 1ml