Ethephon, 100 µg/ml, Acetonitrile, 5ml

2,2',3',4,6-Pentachlorobiphenyl (98)

Di-n-octyl phthalate-3,4,5,6-d4,1000 µg/mL,isooctane,1mL,

2,2',6-Trichloro[13C12]biphenyl, 1.2ml x 50ug/ml, nonane