15N3-Atrazine, 100 µg/ml, Acetonitrile, 1ml

D3-Chloridazon-methyl-desphenyl, 100 µg/ml, Aceto

2H,2H,3H,3H-Perfluoroundecanoic acid, 50µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 34598-33-9

EPA Method 525 Internals & Surrogates