Atenolol, 100 µg/ml, Acetonitrile, 5ml

Difethialone, 10 µg/mL in Acetonitrile, 10mL

5-Methyl-2-hexanone

2,3,3',4',5,5'-Hexachloro[13C12]biphenyl, 1.2ml x 50ug/ml, nonane