Methomyl, 100 µg/ml, Acetonitrile, 5ml

1,2,3,4-Tetrachloro[13C12]dibenzo-p-dioxin , 1.2ml x 50ug/ml, toluene

U{13C17}-Aflatoxin B1, 0.5µg/mL, Solvent-acetonitrile, Unit 1.2mL, # of units-1, Cas.no.

17ß(H),21 alpha(H)-Hopane, 100µg/mLin isooctane, 1ml