D5-Atrazine, 100 µg/ml, Acetone, 1ml

Alachlor (ring 13C6), 100ug/ml in n-Nonane, 1,2ml

Di-n-nonyl phthalate, neat, Solvent-neat, Unit 100mg, # of units-1, Cas.no. 84-76-4

EPA Method 552.1 - Surrogate Standard