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Hach's USEPA-approved dichromate COD Method is the most widely used chemical oxygen demand (COD) method for NPDES reporting in the world.

Hach COD Digestion Vials (Low Range), pack of 25. For determination of low range Chemical Oxygen Demand (COD) by the Reactor ... Why Buy From Fondriest?

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Hach's USEPA-approved dichromate COD Method is the most widely used chemical oxygen demand (COD) method for NPDES reporting in the world.

In addition, we offer a COD digestor and photometers for low-range (0-150 ppm) Our COD line is compatible with most instruments that accept 16 mm vials, ...

CHEMetrics offers two dichromate reactor digestion methods for fast, easy, safe determinations of low-, mid-, and high-range COD levels in wastewater: the 

Our vials are packaged in spectrally uniform 16mm glass cells that fit right into your COD reactor. Each vial is verified against NIST standards to assure the 

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