EPA Method 610 PAH Mix, in MeCH:MeOH, 1ml

9(R)-Hexahydrocannabinol, 1000µg/ml in Acetonitrile, 1ml

BTEX (1.0 µg/mL)

Sodium 1H,1H,2H,2H-perfluoro(1,2-13C2)dodecanesulfonate (10:2), 50µg/ml in MeOH, 1,2ml