Method 1640Mix A Back Catalog number: 53146 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 52002 Nitric Acid Blank Price on request 3583.13-K-IO Thioxanthone, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 492-22-8 Price on request 680505 D3-Ofloxacin, 100 µg/ml, Acetonitrile, 1ml Price on request