QC Standard 2 Back Catalog number: 56085 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 91806 Semi-Volatile Mix #1 Price on request 73576 DL-Lactic acid Price on request 678218 Isoproturon-desmethyl, 100 µg/ml, Acetonitrile, 1ml Price on request