EPA Method 8315 Calibration Mix #1 Back Catalog number: 83509 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 66003 PCB No. 3, 100µg/ml in Isooctane, 1ml Price on request M373553 Mitragynine-d3, 1mg Price on request C17009500 Sulfosulfuron, 100mg Price on request