EPA Method 502.2 Internal Standard Back Catalog number: 91703 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 675416 PSA-C18-Mix 10 Price on request 675968 D5-Acetochlor OA, 100 µg/ml, Acetonitrile, 1ml Price on request 50695 ICP-MS Mix #1 Price on request