Pretilachlor, 100 µg/ml, Acetonitrile, 5ml

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

Flurochloridone, 10 µg/ml, Acetonitrile, 10ml

Methyl-t-butyl ether