Internal Standard Back Catalog number: 92467 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended ACQ-WH05-015 Ethanol standard in whole blood,0.5g/L,whole blood, 1.5mL Price on request 675586 Sulfaphenazole, 100mg Price on request 676338 Bifenazate-diazene, 100 µg/ml, Acetonitrile, 1ml Price on request