Sulfamethazine, 100 µg/ml, Methanol, 1ml

2,2',3,4',5,5',6-Heptachloro-4-[13C12]biphenylol, 1.2ml x 50ug/ml, toluene

Sulfanilamide, 100µg/ml in MeOH, 5ml

Isodecyl diphenyl phosphate, 100µg/ml in Toluene, 1ml