EPA Method 353.2 Nitrate & Nitrite Back Catalog number: 52120 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 72358 Nitrocellulose Price on request 679283 Metoprolol acid, 25mg Price on request S-4361 2,4,6-Tribromophenol, Internal Standard Stock Solution Cat No 2060.6 1.148mg/mL, in ethanol, 5mL Price on request