EPA Method 525 Internals & Surrogates Back Catalog number: 95227 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 94785 525.2 Calibration Standard Price on request 675107 Sodium p-n-tridecylbenzenesulfonate, 100 µg/ml, M Price on request 71598 Flutolanil Price on request