EPA Method 551.1 Internal Standard

1,4,6-Trimethylnaphthalene, 500µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 2131-42-2

Disulfoton-sulfoxide, 100 µg/ml, Acetonitrile, 5

MA - EPH Matrix Spike Rev 1.0/1.1