Thermo Scientific Orion® AQUAfast® COD Test Kit 0 to 1500 mg/L, EPA Compliant. Thermo Scientific Orion® liquid tests, such as the AC2009 Liquid SPADNS test for fluoride in water, and reagents offer different measurement ranges. Different interference ranges make these tests and reagents easier to use than other test forms. Range: 0 to 1500 mg/L. Number of test: 25. High range. Per pack