GFAA Initial Calibration Verification Back Catalog number: 53315 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 95081 4-Isobutylbenzoic acid Price on request 73141 Quinine Price on request 679887 o-Dianisidine, 100 µg/ml, Acetonitrile, 1ml Price on request