EPA Method 524 & 624 - Internal Standard

1-Naphthol

17 alpha(H),21ß(H)-(22RS)-Bishomohopane, neat, Solvent-neat, Unit ca. 10µg , # of units-1, Cas.no. 54352-50-0

Perfluoro-n-[13C8]octanoic acid, 50µg/ml in MeOH, 1,2ml