EPA Method 8315 Calibration Mix #1 Back Catalog number: 83509 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 676263 Hexestrol, 100mg Price on request 55140 CWA Color Price on request 673467 Triforine, 100 µg/ml, Acetonitrile, 5ml Price on request