Nitrate & Nitrite as N Back Catalog number: 54162 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended C242950 Cefotaxime Sodium, 1g Price on request 678492 Propyzamide, 100 µg/ml, Acetonitrile, 5ml Price on request 30197 Method 532 Surrogate Standard Price on request