Internal & Surrogate Standard Back Catalog number: 97790 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended A634300 Ampicillin, 1g Price on request 681216 Ethyl hexanoate, 250mg Price on request 677915 Mefenacet, 100 µg/ml, Acetonitrile, 1ml Price on request