Terbuthylazine, 100 µg/ml, Acetonitrile, 5ml

Sodium perfluoro-7-methyloctanesulfonate, 1.2ml x 50ug/ml, methanol

4,4'-DDT (ring-13C12), 100ug/ml in n-Nonane, 1,2ml

1,2-Dibromopropane, 100µg/ml in MTBE, 1ml