2,4',5-Trichloro[13C12]biphenyl, 1.2ml x 50ug/ml, nonane

Sodium 1H,1H,2H,2H-perfluoro(1,2-13C2)dodecanesulfonate (10:2), 50µg/ml in MeOH, 1,2ml

Anthraquinone, 100 µg/ml, Acetonitrile, 5ml

Octachloronaphthalene