pH 7.0 Standard @ 25°C

Hexachlorobenzene, 10.0 µg/ml, Acetonitrile, 10m

Progesterone-2,2,4,6,17 alpha,21,21,21-d9, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 15775-74-3

Terbuthylazine-desethyl-2-hydroxy, 10µg/ml in Acetonitrile, 10ml