EPA Method 353.2 Nitrate + Nitrite Back Catalog number: 53120 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 57381 Thallium (Tl) Price on request 2972.14-100-IO 2,4'-DDT-d8, 100µg/ml in Isooctane, 1ml Price on request 679801 Ofloxacin, 100 µg/ml, Methanol, 1ml Price on request