Benzene/n-Hexane Control Standard Benzene/n-Hexane = 1:2 (Neat 1mL)

Simazine, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 122-34-9

Profenofos, 100 µg/ml, Acetonitrile, 5ml

17 alpha(H),21ß(H)-Hopane, 100µg/mL in Isooctane, 1ml