D4-Dithianon, 100 µg/ml, Acetonitrile, 1ml

Tributyl O-acetylcitrate, 250mg

2,2',3,3',4,4',5,5'-Octachloro[13C12]biphenyl, 50.0µg/mL in Nonane/10% toluene, 1,2ml

Caffeine, 100 µg/ml, Methanol, 1ml