Behenic acid, 100 µg/ml, Acetonitrile, 1ml

Formaldehyd-DNPH, 100mg

Nortriptyline hydrochloride, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 894-71-3

EPA Method 8040A - Analytes Mix “A”, 2000µg/mL in 2-propanol, 1ml