Atrazine, 10.0 µg/ml, Acetonitrile, 10ml

2,2',3,3',4,4',5,5',6-Nonachloro[13C12]biphenyl, 50.0µg/mL in Nonane/10% toluene, 1,2ml

Ammonia as (NH4+)

Fenthion-sulfone, 100 µg/ml, Acetonitrile, 5ml