Method 1640Mix A Back Catalog number: 52146 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended XA12700000AL Dimethoate, 100µg/ml in Acetonitrile, 1ml Price on request 72809 Perfluoroheptanoic acid Price on request 94567 PCB Congener Mix, 100µg/ml in Isooctane, 1ml Price on request