Ethoxyquin, 100 µg/ml, Ethyl acetate, 5ml

Di-n-propyl phthalate-3,4,5,6-d4,1000 µg/mL,isooctane,10mL

2-Methylchrysene, 10µg/mL in Acetonitrile, 10ml

4'-Aminoazobenzene-4-sulphonic acid, 1g