4-Hydroxysulfadiazine,10 µg/mL,MeOH,1mL,

624B Internal / Surrogate Standard

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

3,4'-Dichlorobiphenyl ,100 µg/mL,isooctane,1mL