EPA Method 525 Internals & Surrogates Back Catalog number: 95227 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 93994 Benzo(b)fluoranthene Price on request 79021 Endrin, 1000µg/ml in Hexane, 1ml Price on request 92805 Gas Internal/Surrogate Standard Price on request