Reference
Method
Test
Reagent #
Reagent Name
EPA
Titrimetric, Mid-Level
Chemical Oxygen Demand
6.4
Standard Ferrous Ammonium Sulfate, 0.25 N
EPA
Titrimetric, High Level for Saline Waters
Chemical Oxygen Demand
6.3
Standard Ferrous Ammonium Sulfate, 0.250 N
ASTM
Macro COD by Reflux Digestion and Titration
Chemical Oxygen Demand
14.1
Ferrous Ammonium Sulfate Solution (0.25 N)
APHA
Open Reflux Method
Chemical Oxygen Demand
3d
Standard Ferrous Ammonium Sulfate (FAS) Titrant, 0.25 M