Tris(2-butoxyethyl) phosphate, 1.2ml x 50ug/ml, toluene

Perfluoro-n-[1,2-13C2]dodecanoic acid, 50µg/ml in MeOH, 1,2ml

Phenanthrene-9,10-13C2,100 µg/mL,n-nonane,1mL

4,4'-DDT, 100 µg/ml, Cyclohexane, 1ml