PCB No. 14, 100µg/ml in Isooctane, 1ml

Fenbutatin oxide, 10 µg/ml, Cyclohexane, 10ml

2-Propanol

2',3,3',4',5,5'-Hexachloro-4-[13C12]biphenylol, 1.2ml x 50ug/ml, toluene