Internal Standard

Tri-p-cresyl phosphate, 100 µg/ml, Methanol, 5ml

Octachloro[13C12]dibenzo-p-dioxin, 1.2ml x 50ug/ml, toluene

1,2-Dimethyl-3-ethylbenzene, 1000µg/mL, Solvent-hexane, Unit 1mL, # of units-1, Cas.no. 933-98-2