Mephosfolan, 100 µg/ml, Cyclohexane, 5ml

2,4'-DDE, 100 µg/ml, Ethyl acetate, 5ml

1,2,4,7,9-Pentachloro[13C12]dibenzo-p-dioxin, 1.2ml x 50ug/ml, toluene

1H,1H,2H,2H-Perfluoro-n-octyl methacrylate,50 µg/mL,MeOH,1mL,