D3-Ketoprofen, 100 µg/ml, Acetonitrile, 1ml

1,2,3,6,7,8-Hexachloro[13C12]dibenzo-p-dioxin, 1.2ml x 50ug/ml, toluene

Phenol-d6, 1000µg/ml in MeOH, 1ml

N-Nitroso-N-methyl-4-aminobutyric acid, 25mg