EPA Method 353.2 Nitrate & Nitrite Back Catalog number: 52120 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended T1600000 alpha-Tocopheryl acetate, 500mg Price on request 50647 Sodium arsenate dibasic heptahydrate (As) Price on request 675303 Hexazinone, 100 µg/ml, Acetonitrile, 5ml Price on request