Interference Check Standard Back Catalog number: 50329 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 682001 Fumaric acid, 250mg Price on request 675870 Metazachlor OA, 100 µg/ml, Acetonitrile, 1ml Price on request 70471 Perylene, 1000µg/ml in methylene chloride, 1ml Price on request