Fonofos, 10 µg/ml, Ethyl acetate, 10ml

Furosemide, 100µg/ml in Acetonitrile, 5ml

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

Dibenzo(a,i)pyrene