Hach offers complete systems for chemical oxygen demand (COD) analysis, with prepared COD reagents, a reactor, and spectrophotometers and.
Zhejiang Aijiren,Inc. is one of the leading China COD vials manufacturers and suppliers, welcome to wholesale cheap COD vials from us.
Hach's USEPA-approved dichromate COD Method is the most widely used chemical oxygen demand (COD) method for NPDES reporting in the world.