EPA Method 502/524 Fortification Solution

2,2-Bis(4-hydroxy-13C6-phenyl)propane, 1.2ml x 50ug/ml, methanol

Dibenzo-p-dioxin, 1.2ml x 50ug/ml, toluene

17 alpha(H),21ß(H)-25-Norhopane, neat, Solvent-neat, Unit ca. 5µg, # of units-1, Cas.no. 84276-47-1