EPA Method 8121 Internal Standard Back Catalog number: 81203 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended XA12570000CY Dicofol 100 µg/mL in Cyclohexane, 1ml Price on request DD-0-S Dibenzo-p-dioxin, 1.2ml x 50ug/ml, toluene Price on request 97742 EPA Method 8270 PAH Standard Price on request