Mass-Labelled PCB Syringe Spike Solution, 1.2ml, nonane

alpha-Methylstyrene, 200 µg/ml, Methanol, 1ml

Ioxynil-octanoate, 100 µg/ml, Ethyl acetate, 1ml

Pure ß-Glucuronidase from overexpressing recombinant E. coli ,>50,000 u/ml,50% aqueous glycerol soln,5mL