EPA Method 528 Internal Standard Back Catalog number: 93188 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 678441 Mirex, 100 µg/ml, Acetonitrile, 5ml Price on request 59889 ICP Mix Price on request ENDOS-S Endosulfan Sulfate, 1.2mL x 100ug/mL, nonane Price on request