EPA Method 509 Internal Standard Back Catalog number: 30097 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673204 Atrazine-desethyl, 10.0 µg/ml, Acetonitrile, 10m Price on request 11923.17-K- ME Bumetanide,1000 µg/mL,MeOH,1mL, Price on request 677803 Oxalic acid, 250mg Price on request