Dienestrol, 25mg

d2 C27 alpha alpha alpha (20R)-Cholestane, 100µg/mL in Isooctane, 1ml

Azinphos ethyl, 1000µg/ml in MeOH, 1ml

1,2,3,4,6,7-Hexachloro[13C12]dibenzo-p-dioxin, 1.2ml x 50ug/ml, toluene