EPA Method 525 Internals & Surrogates Back Catalog number: 91161 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 83510 EPA Method 8315 Calibration Mix #2 Price on request 50199 Mercury (Hg) Price on request DD-237-S 2,3,7-Trichlorodibenzo-p-dioxin, 1.2ml x 50ug/ml, nonane Price on request