Method 4 Standard 1 Back Catalog number: 93233 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 52253 Group I Elements Starter Kit Price on request 676873 6-Methylchrysene, 100 µg/ml, Acetonitrile, 5ml Price on request 677076 Clofentezine, 100 µg/ml, Methanol, 5ml Price on request