EPA Method 551.1 Performance Check Sol’n

EPTC, 100 µg/ml, Acetonitrile, 1ml

17 alpha(H),21ß(H)-(22RS)-Bishomohopane, 50µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 54352-50-0

(±)-Sotalol-d7 hydrochloride (isopropyl-d7),1000 µg/mL,MeOH,1mL,