Difenacoum, 10 µg/ml, Acetonitrile, 10ml

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

Perfluoro-4,5-dimethylhexane sulfonate, 200ul x 1.00ug/ml, methanol

2,3,4,6-Tetrachloroanisole