Probenecid, 100mg

Paraoxon-ethyl, 10 µg/ml, Cyclohexane, 10ml

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

Benzo(a)anthracene-d12, 1000µg/ml in Methylene Chloride, 1ml